US Pat. No. 9,723,741

HOUSING ARRANGEMENT OF A POWER ELECTRONICS DEVICE

VACON OY, Vaasa (FI)

1. A housing arrangement of a power electronics device, comprising one power module or several identical power modules, each
module having at least one part connectable to a hazardous voltage, the arrangement further comprising a housing part having
room for at least one power module,
wherein:
each individual power module including an enclosure part which essentially surrounds the power module with electrically insulating
material substantially surrounding the enclosure part of each individual power module wherein each individual power module
is electrically insulated when installed within the housing part and each individual power module is electrically insulated
when removed from the housing part, and

all the external connections of the power module are placed on one single wall of the enclosure part, and
the external connections of the power module are directed to the front side of the housing part.

US Pat. No. 9,367,788

ARRANGEMENT FOR CONNECTING SET VALUES CONCERNING PERFORMANCE TO AN ELECTRONICS DEVICE

VACON OYJ, Vaasa (FI)

1. Arrangement for connecting set values concerning performance to an electronics device, more particularly to a power electronics
device, a frequency converter, which arrangement comprises a rating plate part comprising:
the rating plate part is a separate unit belonging to a nameplate arrangement of the electronics device, which unit is adapted
to be affixed to the electronics device, and

the rating plate part comprises a memory means, an EEPROM memory circuit, in which values concerning the performance of the
electronics device are recorded, and

the rating plate part further comprises an area in which information corresponding to the values concerning performance that
are recorded in memory are permanently registered in such a way that this information remains visible when the rating plate
part is affixed to the electronics device,

wherein the rating plate part further comprises a communication means for the digital data transfer occurring with the electronics
device, by the aid of which communication means the values concerning performance that relate to the electronics device is
transferred from the rating plate part to the electronics device.

US Pat. No. 9,282,677

POWER ELECTRONICS DEVICE

VACON OYJ, Vaasa (FI)

1. A power electronics device that is a frequency converter, the power electronics device comprising:
liquid-cooled power units including at least one power semiconductor component that is an insulated-gate bipolar transistor
(IGBT) or a diode, wherein the power units are mechanically separate;

a substrate, among at least one substrate, and on which the power units are disposed, wherein the substrate includes liquid
cooling ducts and is common to more than one power unit;

an electrical interface connected to each power unit via a power circuit interface on a side surface of each power unit, and
connected to the substrate via a supporting insulator on a top surface of the substrate, wherein each power unit is connected,
via a liquid cooling interface on a bottom surface of each power unit, to a liquid cooling interface on the top surface of
the substrate;

electrical connectors on a top surface of each power unit for connecting to outside each power unit; and
one liquid cooling interface and one power circuit interface on a side surface of the substrate for connecting to outside
the substrate.

US Pat. No. 9,397,595

PMSM ROTOR ANGLE IDENTIFICATION

VACON OYJ, Vaasa (FI)

1. A method for identifying the angle and polarity of the rotor of a permanent magnet synchronous motor (PMSM), controlled
by a frequency converter, the motor comprising a stator, including windings and a rotor comprising at least two permanent
magnets, wherein the method comprises:
determining the rotor d-axis direction by supplying stator voltage vector pulses to the motor terminals at at least two different
angles, measuring the phase current at each angle, and determining the rotor d-axis direction based on motor inductance values
in each stator angle, which inductance values have been calculated from the measured values, and

determining the rotor d-axis polarity by supplying a torque producing current vector to the motor terminals at the q-axis
direction, and determining the magnet polarity by observing the direction of the rotor rotation during the test pulses.

US Pat. No. 9,204,579

POWER ELECTRONICS DEVICE AND ITS COOLING ARRANGEMENT

VACON OYJ, Vaasa (FI)

1. Liquid-cooled power unit of a power electronics device, which power unit comprises at least two power modules,
the cooling surface of which power modules is provided with pin-type protrusions, and
which power modules are fixed to the frame part of the power unit,
wherein
a liquid duct is arranged inside the frame part of the power unit, and
the power modules are fixed to the points of the apertures situated in the frame part on both sides of the liquid duct in
such a way that the pin-type protrusions of the power modules are situated in the liquid duct, and

at least one wedge-shaped part is fitted into the liquid duct, which wedge-shaped part comprises a wedge-shaped front part
for spreading the liquid flow into two essentially equal flows at the point of the power modules.

US Pat. No. 9,755,499

ELECTRIC INTERFERENCE LIMITATION

VACON OY, Vaasa (FI)

1. A method of operating a control of a frequency converter,
the method comprising:
connecting the frequency converter between a load and a common electric power network without a common mode filter;
connecting a current measurement circuit for measuring common mode current values between the electric power network and the
frequency converter;

connecting a voltage measurement circuit for measuring the output voltages of the frequency converter;
scanning, via a control, through a permissible switching frequency range by changing a switching frequency of the at least
one switch type component through a whole permissible switching frequency range, the switching frequency being frequency of
an average value of the measured output voltages of the frequency converter;

recording, via the control, the measured common mode current values as a function of the switching frequency;
setting a switching frequency of at least one switch type component of the frequency converter;
changing the output value of the at least one switching type component at a predetermined permissible switching frequency
range; and

setting, via the control, a final switching frequency of the at least one switch type component to a frequency value where
a local minimum value of the common mode current has been recorded.

US Pat. No. 10,123,455

LIQUID COOLING ARRANGEMENT

VACON OY, Vaasa (FI)

1. An arrangement for cooling, with liquid, one or more electrical devices or structural units of an electrical device that is/are in at least one installation enclosure, which arrangement comprises a suction channel (32) and a return channel (33) for distributing the liquid to the one or more electrical devices (22) to be cooled or to the structural units of the one or more electrical devices, a liquid container (30), which is connected to the return channel (33) directly and to the suction channel (32) via a second suction channel (28), a pump and a heat exchanger (24), and a shut-off valve (34) being operatively connected to the return channel (33) and being positioned at an uppermost point of the return channel (33),wherein the liquid container (30) is disposed below the one or more electrical devices (22) to be cooled or structural units of the one or more electrical devices (22) to be cooled, and
an amount of liquid to be contained in the arrangement is configured to be such that ends of both the second suction channel (28) and the return channel (33) that are inside the liquid container (30) are situated below a liquid surface (29) of the liquid container (30),
wherein the pump includes a drive motor (26), and a speed of rotation of the drive motor (26) of the pump is configured to be controlled according to a cooling requirement by monitoring a temperature of the one or more electrical devices (22) to be cooled or of the structural units of the one or more electrical devices,
wherein when the shut-off valve (34) is closed, liquid is retained within the return channel (33) due to hydrostatic pressure and a positioning of the ends of the second suction channel (28) and the return channel (33) below the liquid surface (29).

US Pat. No. 10,177,679

MULTILEVEL INVERTER

Vacon Oy, Vaasa (FI)

1. An inverter circuit having a first power node coupled to a positive of a supplying DC link voltage, a second power node coupled to a negative of the supplying DC link voltage, a third power node coupled to a mid-point between the positive of the supplying DC link voltage and the negative of the supplying DC link voltage, and an output node, the inverter circuit comprising:a first series connection of six unidirectional power semiconductor switches, each having an anode and a cathode, and each coupled to an antiparallel diode, wherein the anode of the first unidirectional power semiconductor switch is coupled to the first power node, the cathode of the sixth unidirectional power semiconductor switch is coupled to the second power node and the anodes of the second to sixth unidirectional power semiconductor switches are coupled to the cathodes of the first to fifth unidirectional power semiconductor switches in the first series connection respectively, wherein the cathode of the third unidirectional power semiconductor switch is coupled to the output node of the inverter circuit;
a bidirectional power semiconductor circuit, coupled between the third power node of the inverter circuit and an internal node of the inverter circuit;
a second series connection of two internal capacitors, coupled between the cathodes of the first and the fifth unidirectional power semiconductor switches of the series connection, and midpoint of the series connected capacitors is connected to the internal node of the inverter circuit;
a third series connection of two internal diodes, coupled in forward direction from the cathode of the fourth to the cathode of the second unidirectional power semiconductor switch of the first series connection, a connection point of the two internal diodes being coupled to the internal node of the inverter circuit.

US Pat. No. 10,298,149

POWER ELECTRONIC CONVERTER AND A METHOD FOR CONTROLLING IT

Vacon Oy, Vaasa (FI)

1. A power electronic converter comprising:electric terminals for connecting to an external electric system,
controllable switches connected to the electric terminals,
a control system for operating the controllable switches so as to control voltages of the electric terminals, and
a voltage sensor connected to the electric terminals,wherein the control system is configured to:control one or more of the controllable switches so as to produce at least one test voltage pulse at the electric terminals,
receive, from the voltage sensor, a sensor signal indicative of a reflected voltage detected from the electric terminals, the reflected voltage arriving from the external electric system and being caused by a reflection of the test voltage pulse, and
control operation of the power electronic converter at least partly in accordance with information based on the sensor signal.

US Pat. No. 10,270,367

FREQUENCY CONVERTER WITH LCL LINE AND COMMON MODE FILTER

VACON OY, Vaasa (FI)

1. A filtering arrangement for a system comprising a regenerative frequency converter and a motor,which regenerative frequency converter has an intermediate DC circuit comprising positive and negative pole, and
which regenerative frequency converter is connected to a supplying 3-phase mains network via a line filter unit comprising in serial connection a first 3-phase inductor unit with mains side terminals and motor side terminals and a second 3-phase inductor unit, and a 3-phase capacitor unit which comprises phase-specific capacitors which are connected in star connection between the motor side terminals of the first 3-phase inductor unit and a star point, which star point is connected to ground via a fourth capacitor,
wherein
the filtering arrangement further comprises a common mode inductor unit and a filtering capacitor unit,
which filtering capacitor unit comprises two capacitors in serial connection between the poles of the intermediate DC circuit such that the common point of the capacitors is connected to the star point of the capacitor unit in the line filter unit, and
wherein the filter arrangement is configured to determine the control pattern of the controllable power switches by using a 60° bus clamp modulation or a softened 60° bus clamp modulation.

US Pat. No. 10,433,448

ARRANGEMENT FOR OSCILLATION DAMPENING

Vacon Oy, Vaasa (FI)

1. A power electronics device, such as a frequency converter, comprising power units (REC1, INU1, INU2, CDC1), a metal frame and a DC bus arrangement in which the power units are connected, wherein the power units are assembled inside the metal frame, and wherein the shape of the metal frame is elongated with rectangular cross-sectional shape, consisting of a bottom part and from that essentially vertical oriented side wall parts, wherein the DC bus arrangement is arranged on top of the bottom part of the metal frame and separated by an insulator layer (Si) from the metal frame, and the DC bus arrangement comprises a first DC bus current conductor (DC+) and a second DC bus current conductor (DC?) which are arranged side by side and apart from each other, wherein the DC bus current conductors (DC+, DC?) have a flat shape in such a way that their thickness dimension is essentially shorter than their width dimension;and wherein the first DC bus current conductor (DC+) and the second DC bus current conductor (DC?) are only separated from the bottom part of the metal frame by a thickness of the insulator layer (Si).

US Pat. No. 10,364,863

ARRANGEMENT FOR FASTENING A POWER ELECTRONIC DEVICE SUCH AS A FREQUENCY CONVERTER

Vacon Oy, Vaasa (FI)

1. An arrangement for fastening, at multiple fastening points, a frequency converter to a base susceptible to vibration, at least a portion of which fastening points are vibration-damped, and which fastening points are on two opposite sides of the frequency converter, wherein there are at least two fastening points on each of two opposite sides of the frequency converter, wherein fastening points on one side are damped while fastening points on the other side are undamped.

US Pat. No. 10,432,189

CONTROL OF SEMICONDUCTOR SWITCH

VACON OY, Vaasa (FI)

1. An arrangement for controlling, by means of a voltage signal inputted between gate and emitter terminals (G-E), a switch type power semiconductor component in the form of an IGBT transistor, the arrangement comprising:at least one resistance and at least one switch (RGON1-SGON1, RGOFF1-SGOFF1) connected in series between an auxiliary voltage (+UG4, ?UG4) of a gate controller and the gate terminal (G) of the IGBT;
a measuring circuit, adapted to measure a collector voltage between collector and emitter terminals of the IGBT and to form therefrom a signal (duC4/dt) proportional to a rate of change of the collector voltage; and
a signal modification circuit, adapted to control the at least one switch (SGON1, SGOFF1) connected in series with the at least one resistance with a high frequency of at least 1 MHz, by means of the rate of change (duC4/dt) of the collector voltage influencing the duty cycles of control signals (PWMON, PWMOFF, PWMON21, PWMON22) of the at least one switch;
wherein the at least one switch (SGON1, SGOFF1) and the at least one resistance (RGOFF1, RGON1) connected in series therewith are connected in parallel with a gate resistance that is connected between the IGBT's gate terminal and the auxiliary voltage of the gate controller all the time that the IGBT is controlled to be in a conducting state and all the time that the IGBT is controlled to be in a non-conducting state.