US Pat. No. 9,112,376

AC BACKUP POWER SYSTEM

ACBEL POLYTECH INC., New...

1. An AC backup power system comprising:
a power supply having an input circuit;
a switching module comprising a first switching unit and a second switching unit, input terminals of the first and second
switching units connected respectively to a primary AC power source and a backup AC power source, and output terminals of
the first and second switching units controllably connected to the input circuit of the power supply; and

a monitoring module comprising
a first processor;
a power monitoring unit having input terminals connected to the primary and backup AC power sources and having output terminals
connected to the first processor;

a first circuit switch controlled by the first processor to be turned on or off and connected in series between the switching
module and the input circuit of the power supply; and

a second circuit switch which is an electronic switch controlled by the first processor to be on or off and connected in parallel
to the first circuit switch;

wherein when an input power of the input circuit of the power supply is abnormal, the first processor turns off the first
circuit switch, and then turns on the second circuit switch at the time when no current flows to the input circuit of the
power supply.

US Pat. No. 9,312,745

UNIVERSAL POWER SUPPLY SYSTEM

ACBEL POLYTECH INC., New...

1. A universal power supply system comprising:
a housing;
a backboard module mounted to the housing, and having:
multiple DC power and communication interfaces, each having a DC power input and output (I/O) port; and
a monitoring circuit electrically connected to the DC power and communication interfaces and having:
multiple enable terminals;
multiple current detection terminals;
multiple specification identification terminals; and
a specification mapping table built therein and storing multiple model numbers and multiple critical current values corresponding
to the model numbers;

multiple AC-to-DC (AC/DC) power supply devices at an input side mounted inside the housing, each AC/DC power supply device
having a DC power output terminal connected to the DC power I/O port of one of the DC power and communication interfaces;
and

multiple board mounted DC power modules mounted inside the housing, and plugged in corresponding DC power and communication
interfaces of the backboard module, each board mounted DC power module having:

a specification setting circuit;
a specification setting terminal electrically connected to a corresponding specification identification terminal of the monitoring
circuit;

an enable terminal electronically connected to a corresponding enable terminal of the monitoring circuit; and
a current output terminal connected to a corresponding current detection terminal of the monitoring circuit;
wherein the monitoring circuit reads a specification identification signal from the specification setting circuit of each
board mounted DC power module, identifies a model number according to the specification identification signal and sets a critical
current value for over-current protection of the respective board mounted DC power module to the critical current value in
the specification mapping table corresponding to the identified model number.

US Pat. No. 9,229,511

REDUNDANT POWER SYSTEM

ACBEL POLYTECH INC., New...

1. A redundant power system connected to an external device, the redundant power system comprising a first power supply and
a second power supply;
the first power supply having a first front-stage power circuit and a first rear-stage power circuit, the first rear-stage
power circuit having a first controller to be operated in a normal mode, a master mode or a slave mode, the first controller
obtaining an output voltage and an output current from a power output terminal of the first power supply and having:

a first communication port for receiving a mode setting command from the external device; and
a first I/O (input and output) port; and
the second power supply having a second front-stage power circuit and a second rear-stage power circuit, the second rear-stage
power circuit having a second controller, the second controller having

a second communication port; and
a second I/O port connected to the first I/O port;
wherein when the first controller determines that the first power supply normally provides power based on the output voltage
and the output current of the first power supply, the first controller selects one of the modes and executes the selected
mode according to the mode setting command from the first communication port and a voltage level of the second I/O port of
the second controller;

when the mode setting command is a normal mode setting command, the first controller executes the normal mode to set a low
voltage level on the first I/O port, and to control the first power supply to provide an average power;

when the mode setting command is a master mode setting command, the first controller executes the master mode to determine
whether a present loading power is higher than an heavy loading power or lower than a light loading power; when the present
loading power is higher than the heavy loading power, the first controller sets a low voltage level on the first I/O port,
and controls the first power supply to provide the average power; when the present loading power is lower than the light loading
power, the first controller sets the high voltage level on the first I/O port, and controls the first power supply to provide
a full power; and

when the mode setting command is a slave mode setting command, the first controller executes the slave mode to set the first
I/O port as an input port for detecting the voltage level of the second I/O port of the second power supply; when the voltage
level of the second I/O port is low, the first controller controls the first power supply to provide the average power or
the full power; when the voltage level of the second I/O port is high, the first controller controls the first power supply
to stop providing power.

US Pat. No. 9,448,607

IRREGULARITY DETECTION DEVICE FOR A POWER SWITCH

Acbel Polytech Inc., New...

1. An irregularity detection device for a power switch, wherein the irregularity detection device is connected to a current
path of a power switch and comprises:
a voltage-dividing circuit having a voltage-dividing node; and
a voltage-controlled switch connected between the voltage-dividing node of the voltage-dividing circuit and the current path
of the power switch;

wherein
when a voltage on the current path of the power switch is less than a first configuration value, the voltage-controlled switch
is turned on for a voltage at the voltage-dividing node to be less than a second configuration value; and

when the voltage on the current path of the power switch is greater than or equal to the first configuration value, the voltage-controlled
switch is turned off for the irregularity detection device to generate an irregularity alarm when the voltage at the voltage-dividing
node is greater than or equal to the second configuration value.

US Pat. No. 9,160,160

POWER SUPPLY WITH OUTPUT PROTECTION AND CONTROL METHOD OF THE POWER SUPPLY

ACBEL POLYTECH INC., New...

1. A control method of a power supply, the control method comprising steps of:
(a) providing an over-current protection value;
(b) setting a pre-protection value being lower than the over-current protection value;
(c) acquiring a present output current of the power supply;
(d) determining whether the present output current is higher than or equal to the pre-protection value;
(e) taking an over-current protecting action when the present output current is higher than or equal to the over-current protection
value;

(f) executing a first temperature determination process when the present output current is between the pre-protection value
and the over-current protection value;

(g) stopping an output voltage of the power supply when a present temperature of the power supply is abnormal by executing
the first temperature determination process; and

(h) returning to the step (c) when the present temperature of the power supply is normal by executing the first temperature
determination process.

US Pat. No. 9,425,697

POWER SUPPLY AND METHOD FOR COMPENSATING LOW-FREQUENCY OUTPUT VOLTAGE RIPPLE THEREOF

ACBEL POLYTECH INC., New...

1. A method for compensating low-frequency output voltage ripple of a power supply, wherein the power supply has a power factor
correction (PFC) circuit and a DC (Direct Current) to DC conversion circuit, the DC to DC conversion circuit has a DC to DC
controller performing the method, the method comprising steps of:
providing a mapping table with multiple compensation signals built in the DC to DC controller;
continuously acquiring zero-crossing information of an AC (Alternating Current) power from the PFC circuit;
determining if a zero-crossing of the AC input power is taking place according to the zero-crossing information; and
selecting a corresponding compensation signal from the mapping table to compensate a control command when the zero-crossing
of the AC input power is taking place.

US Pat. No. 9,831,617

FILTERED CONNECTOR AND FILTER BOARD THEREOF

ACBEL POLYTECH INC., New...

1. A filtered connector mounted on a casing and comprising:
a connection port having an electrode plate mounted on an end of the connector port adapted to be mounted through and securely
held in a through hole of the casing;

a filter board having:
a circuit board assembly having an elongated slot formed through the circuit board assembly to adjoin a first surface and
a second surface of the circuit board assembly, wherein the first surface and the second surface are opposite each other,
the second surface faces the casing, and the electrode plate of the connection port is mounted through the elongated slot;

multiple grounding spring plates mounted on the second surface of the circuit board assembly to electrically contact the casing;
and

multiple filtering capacitors mounted on the first surface of the circuit board assembly, wherein one end of each filtering
capacitor is electrically connected to the electrode plate of the connection port, and the other end of the filtering capacitor
is electrically connected to the multiple grounding spring plates;

a fastener;
an electrical connection holding plate, wherein one edge of the electrical connection holding plate is securely and electrically
connected with the circuit board assembly of the filter board, and the electrical connection holding plate has a second locking
hole formed through the electrical connection holding plate; and

an electrical connection seat having a third locking hole formed through one portion of the electrical connection seat, wherein
another portion of the electrical connection seat is securely and electrically connected with an internal circuit board, and
the third locking hole is aligned with the second locking hole of the electrical connection holding plate;

wherein the electrode plate of the connection port has a first locking hole aligned with the second locking hole and the third
locking hole, and the fastener is securely mounted through the first locking hole, the second locking hole and the third locking
hole.

US Pat. No. 9,960,636

POWER SUPPLY SYSTEM AND DIRECT-CURRENT CONVERTER THEREOF

ACBEL POLYTECH INC., New...

1. A direct current (DC) converter, comprising:a non-isolated conversion module implemented based on a redundant structure and having a first buck converter, a second buck converter, and an output capacitor, wherein the first buck converter and the second buck converter are connected and commonly share the output capacitor; and
an isolated conversion module having:
a set of input terminals connected to output capacitor of the non-isolated conversion module; and
a set of output terminals;
wherein
each of the first buck converter and the second buck converter of the non-isolated conversion module has a positive terminal and a negative terminal;
the output capacitor has:
a first end constituting a positive output terminal of the non-isolated conversion module, and connected to the set of input terminals of the isolated conversion module and the positive terminals of the first buck converter and the second buck converter; and
a second end constituting a negative output terminal of the non-isolated conversion module, and connected to the set of input terminals of the isolated conversion module;
the first buck converter has:
a first diode having:
an anode; and
a cathode connected to the positive terminal of the first buck converter;
a first inductor having two ends, wherein one of the two ends of the first inductor is connected to the second end of the output capacitor and the other end of the first inductor is connected to the anode of the first diode; and
a first switch being a field effect transistor and having:
a drain connected to the other end of the first inductor and the anode of the first diode;
a source connected to the negative terminal of the first buck converter; and
a gate connected to and controlled by a controller; and
the second buck converter has:
a second diode having:
an anode; and
a cathode connected to the positive terminal of the second buck converter;
a second inductor having two ends, wherein one of the two ends of the second inductor is connected to the second end of the output capacitor and the other end of the second inductor is connected to the anode of the second diode; and
a second switch being a field effect transistor and having:
a drain connected to the other end of the second inductor and the anode of the second diode;
a source connected to the negative terminal of the second buck converter; and
a gate connected to and controlled by the controller.

US Pat. No. 9,966,861

ACTIVE CLAMP CONVERTER AND CONTROL METHOD FOR THE SAME

ACBEL POLYTECH INC., New...

14. An active clamp converter connected between an alternating current (AC) power supply and a load, the active clamp converter comprising:a rectifier having a DC positive terminal and a DC negative terminal;
an electromagnetic interference filter electrically connected between the alternating current power supply and the rectifier;
a primary side coil;
a master switch;
a primary side resistor, wherein the primary side coil, the master switch and the primary side resistor are connected in series between the DC positive terminal and the DC negative terminal of the rectifier;
a primary side capacitor;
an auxiliary switch connected in series with the primary side capacitor, wherein the auxiliary switch and the primary side capacitor are then connected in parallel with the primary side coil;
the primary side coil connected between the DC positive terminal of the rectifier and a node at which the master switch and the auxiliary switch are connected;
a primary side controller connected to a control terminal of the master switch and a control terminal of the auxiliary switch;
a secondary side switch;
a secondary side coil coupled with the primary side coil, wherein a loop circuit is formed by the secondary side coil, the secondary side switch and the load;
a secondary side controller connected to a control terminal of the secondary side switch;
a compensator connected to the secondary side coil and the primary side controller to generate a compensating signal output to the primary side controller;
wherein the primary side controller detects a state of the load, when the state of the load is a light-load state, a skipping mode is applied; when the state of the load is not the light-load state, an ACF mode is applied;
wherein the skipping mode is to decrease the switch frequency of the master switch and the auxiliary switch when the state of the load is getting light;
wherein the ACF mode is to adjust the switch frequency of the master switch and the auxiliary switch for generating a reverse current to control the master switch when the state of the load is getting heavy.

US Pat. No. 9,985,541

FEED FORWARD CONTROLLING CIRCUIT AND METHOD FOR VOLTAGE RIPPLE RESTRAINT

ACBEL POLYTECH INC., New...

1. A feed forward controlling circuit for voltage ripple restraint connected with a power converter and a controller to reduce voltage ripple of an output voltage from the power converter, and an output terminal of the controller outputting a control signal to control the power converter, and the feed forward controlling circuit for voltage ripple restraint comprising:a feedback attenuation module including:
an attenuation input terminal connected with an output terminal of the power converter to receive the output voltage and attenuating the output voltage to generate an electrical signal; and
an attenuation output terminal for outputting the electrical signal;
a first filter module electrically connected with the attenuation output terminal of the feedback attenuation module to receive the electrical signal and to filter AC portion in the electrical signal so as to generate a DC signal;
a first subtracting amplifier module electrically connected with the attenuation output terminal of the feedback attenuation module and the first filter module to receive the electrical signal and the DC signal and calculate a difference between the electrical signal and the DC signal, and the first subtracting amplifier module further amplifying the difference to generate a ripple compensation signal and output the ripple compensation signal to the output terminal of the controller;
wherein the first filter module includes:
two filter resistors serially connected with each other in a serial connecting point to couple between the attenuation output terminal of the feedback attenuation module and a ground; and
a filter capacitor connected between the serial connecting point and the ground.

US Pat. No. 9,997,994

TOTEM-POLE POWER FACTOR CORRECTOR AND CURRENT-SAMPLING UNIT THEREOF

ACBEL POLYTECH INC., New...

1. A current-sampling unit of a totem-pole power factor corrector that is electrically connected to an alternating-current (AC) power source and a load through a DC-to-DC converter, the current-sampling unit configured to detect a current flowing through a switch unit of the totem-pole power factor corrector, and comprising:a primary-side winding connected in series to the switch unit;
a full-bridge rectifying unit having a first input end, a second input end, a first output end, a second output end, a first sampling switch, and a second sampling switch, and further having a first current sampling path and a second current sampling path, wherein the first sampling switch is on the first current sampling path and the second sampling switch is on the second current sampling path;
a secondary-side winding coupled to the primary-side winding;
a magnetizing inductor;
a demagnetizing component connected in parallel to the secondary-side winding and the magnetizing inductor between the first input end and the second input end of the full-bridge rectifying unit;
a sampling resistor electrically connected between the first output end and the second output end of the full-bridge rectifying unit;
wherein when the AC power source is in a positive half cycle, the first sampling switch is turned on, the second sampling switch is turned off, the magnetizing inductor is magnetized, and through the first current sampling path of the full-bridge rectifying unit, the secondary-side winding and the sampling resistor form a first loop, and when the AC power source is in the positive half cycle, the first sampling switch is turned on, the second sampling switch is turned off, the magnetizing inductor is demagnetized, and the magnetizing inductor and the sampling resistor are disconnected from each other;
wherein when the AC power source is in a negative half cycle, the second sampling switch is turned on, the first sampling switch is turned off, the magnetizing inductor is magnetized, and through the second current sampling path of the full-bridge rectifying unit, the secondary-side winding and the sampling resistor form a second loop, and when the AC power source is in the negative half cycle, the second sampling switch is turned on, the first sampling switch is turned off, the magnetizing inductor is demagnetized, and the magnetizing inductor and the sampling resistor are disconnected from each other.

US Pat. No. 10,342,144

POWER SUPPLY WITH A STAGGERED CONFIGURATION

ACBEL POLYTECH INC., New...

1. A power supply with a staggered configuration comprising:a housing including a first sidewall and a second sidewall which are in parallel with a first direction, wherein an accommodation space is formed between the first sidewall and the second sidewall, wherein opposite ends of the housing along the first direction are a first end and a second end, respectively;
a first power supply module disposed inside of the accommodation space of the housing and between the first end and the second end of the housing;
a second power supply module disposed inside of the accommodation space of the housing and staggered with the first power supply module as well as between the first end and the second end of the housing; wherein
the first power supply module includes a first frontend power conversion unit and a first backend power conversion unit; the second power supply module includes a second frontend power conversion unit and a second backend power conversion unit; wherein the first frontend power conversion unit and the second backend power conversion unit are next to an inner side of the first sidewall, and the second frontend power conversion unit and the first backend power conversion unit are next to an inner side of the second sidewall;
a first power input port disposed at the first end of the housing and connected to an input of the first frontend power conversion unit;
a second power input port disposed at the first end of the housing and connected to an input of the second frontend power conversion unit;
a power output port disposed at the second end of the housing;
a first circuit board disposed inside of the accommodation space and on the first sidewall of the housing, wherein the first frontend power conversion unit and the second backend power conversion unit are mounted on the first circuit board;
a second circuit board disposed inside of the accommodation space and on the second sidewall of the housing, wherein the second frontend power conversion unit and the first backend power conversion unit are mounted on the second circuit board; and
a third circuit board disposed inside of the accommodation space of the housing and connected to the first circuit board and the second circuit board, wherein the power output port is mounted on the third circuit board and extends beyond the second end of the housing, the first frontend power conversion unit is connected to the first backend power conversion unit through the third circuit board, and the second frontend power conversion unit is connected to the second backend power conversion unit through the third circuit board.

US Pat. No. 10,340,808

REDUNDANT POWER SUPPLY APPARATUS

ACBEL POLYTECH INC., New...

1. A redundant power supply apparatus, comprising:at least two power inlets, each power inlet connected to an alternating current (AC) power source;
at least two power supply units, each power supply unit having an input side and the at least two power supply units having a common output side, each input side connected to the power inlet, each power supply unit configured to convert the AC power source into a direct-current (DC) power source; and
a common component connected at the common output side and configured to receive the DC power sources; wherein
the common component is a secondary-side core of a transformer; wherein
each power supply unit comprises a DC/DC converter having an input side and an output side; the input side of the DC/DC converter is coupled to a primary-side core of the transformer, and the output side of the DC/DC converter is commonly coupled to the secondary-side core of the transformer.

US Pat. No. 10,097,081

CONVERTER HAVING LOW LOSS SNUBBER

ACBEL POLYTECH INC., New...

1. A converter having a low loss snubber, comprising:an input terminal;
a transformer, comprising a primary winding and a secondary winding;
a switch; wherein the switch and the primary winding are electrically connected in series, and are electrically connected between the input terminal and a ground;
the low loss snubber, comprising:
a first diode; wherein a cathode of the first diode is electrically connected to the input terminal;
a first capacitor; wherein the first capacitor is electrically connected between an anode of the first diode and a first node connected by the primary winding and the switch;
a second diode;
a third diode; wherein a cathode of the third diode is electrically connected to the anode of the first diode;
a second capacitor; wherein the second capacitor is electrically connected between a cathode of the second diode and the ground;
a first inductor, electrically connected between an anode of the third diode and the cathode of the second diode;
a clamping winding; wherein the clamping winding is magnetically coupled with the primary winding, and the clamping winding is electrically connected between the ground and an anode of the second diode;
a first output terminal;
a second output terminal; wherein the secondary winding is magnetically coupled with the primary winding and the clamping winding, and is electrically connected between the first output terminal and the second output terminal.