Abstract: The present disclosure relates to a motor-driving device with an improved structure of a circuit module. According to the present disclosure, the boards are coupled to each other via a connector or a bolt. This removes wires use, and reduces an assembly tolerance, thereby to improve the device productivity.

Abstract: Disclosed is a device for detecting a phase loss in an output current in an inverter. The device includes: an output current detection unit for detecting two phases output currents from two signals output from two shunt-resistors connected to two phases legs respectively; an output current calculation unit for calculating an output current of one remaining phase using the detected two phases output currents; and an output phase loss detection unit configured for detecting an output phase loss when the calculated output current is within a current band corresponding to the output phase loss or when the calculated output current has a magnitude equal to and a sign opposite to one of the detected two phases output currents.

Abstract: The present invention relates to a method for controlling an inverter to prevent an unnecessary fan trip. The method includes: receiving a fan current; when the fan current is above a high trip level or is below a low trip level, incrementing an error count; when the error count reaches an error count maximum value, incrementing a trip count and initializing the error count; and when the trip count reaches a trip count maximum value, generating a fan trip signal.

Abstract: The present disclosure relates to a motor-driving device with an improved structure of a circuit module. According to the present disclosure, the boards are coupled to each other via a connector or a bolt. This removes wires use, and reduces an assembly tolerance, thereby to improve the device productivity.

Abstract: Disclosed is a device for detecting an instantaneous maximum output current of an inverting module as a peak-current thereof. The inverting module converts a direct current (DC) link voltage to an alternate current (AC) voltage, and includes three-phases legs. Each leg has lower and upper switching elements connected in series. The device includes a shunt resistor serially connected to a lower switching element of each leg of the inverting module; a current detection module configured for detecting an output current from a signal output from each shunt resistor; and a summer configured for receiving and summing the detected output currents from the current detection module and outputting the instantaneous maximum output current of the inverting module as the peak-current thereof.

Abstract: A heterogeneous fieldbus-based gateway system includes a master inverter and a control device. The control device is configured to transmit, to the master inverter, a data indicating that the same monitoring or control command is to be transmitted to all of the master inverter and a plurality of slave inverters. When the master inverter determines based on the data that the control device transmits the same monitoring or control command to all of the master inverter and the plurality of slave inverters, the master inverter is configured to transmit a response to the command to the control device and to transmit the command to each of the slave inverters.

Abstract: A device and method for controlling an inverter is disclosed. The inverter-controlling device in accordance with the present disclosure determines an operation state of a switching element of an initial charging module based on predetermined time durations and a magnitude of a DC link voltage measured at each of time points corresponding to the predetermined time durations.

Abstract: The present invention relates to a device for driving a motor, the device comprising: a main housing for accommodating a circuit module therein, wherein a top of the main housing is partially opened to define an open portion; an input/output (IO) cover coupled to the main housing so as to occupy the open portion; and an auxiliary housing coupled to the main housing at an vertical side face of the main housing.

Abstract: Disclosed herein is an assembly structure for a motor drive unit. An assembly structure for a motor drive unit is disclosed. The assembly structure does not require the time for rotating, laying down, or fastening the components during processes of producing it, so that the time required for production can be shortened. In addition, since no separate fastening part is required, the assembly structure can be simplified and the production costs can be reduced.

Abstract: The present invention relates to an apparatus for correcting a temperature sensing signal of an IGBT temperature sensing device which outputs only a temperature sensing signal having a voltage value equal to or higher than a preset voltage value, by using an output limiting diode. The apparatus includes: a calculating part configured to calculate a conduction current value of the output limiting diode by using the resistance of an NTC thermistor included in the IGBT temperature sensing device; a determining part configured to determine a drop voltage value of a voltage drop occurring in the output limiting diode based on the conduction current value; and a correcting part configured to correct the temperature sensing signal by increasing the voltage of the temperature sensing signal output from the IGBT temperature sensing device by the drop voltage value.

Abstract: Disclosed is a managing device for cooling an inverter. The managing device for cooling an inverter includes a fan controller configured to provide an electric current flowing in a cooling fan; and a controller configured to determine whether the current flowing in the cooling fan is out of a preset range, and, when the current is out of the preset range, configured to control the cooling fan with a control voltage different from an operating voltage of the cooling fan.

Abstract: Disclosed herein is a board apparatus including a printed circuit board, including a first ground wiring disposed on one surface of the printed circuit board; a second ground wiring disposed on the other surface of the printed circuit board; and a switch module disposed in an overlapped region between the first ground wiring and the second ground wiring, and including a bolt which penetrates through the printed circuit board and a nut which is in contact with the second ground wiring and is coupled to a screw of the bolt.

Abstract: Disclosed is a device for detecting an output current of an inverter. The device for detecting an output current of an inverter according to the present disclosure includes a shunt resistor connected to an output end of a capacitor of a direct current (DC) link; a detector connected to the shunt resistor and configured to detect the output current; and a controller configured to control a sampling timing of a current in the detector.

Abstract: Disclosed herein is a board apparatus including a printed circuit board, including a first ground wiring disposed on one surface of the printed circuit board; a second ground wiring disposed on the other surface of the printed circuit board; and a switch module disposed in an overlapped region between the first ground wiring and the second ground wiring, and including a bolt which penetrates through the printed circuit board and a nut which is in contact with the second ground wiring and is coupled to a screw of the bolt.

Abstract: Disclosed is a method for controlling an inverter. The method includes detecting an output current from an inverter to determine a software over-current suppression (S/W OCS) level according to an output frequency of the output current.

Abstract: Disclosed is a device for detecting an output current of an inverter. The device for detecting an output current of an inverter according to the present disclosure includes a shunt resistor connected to an output end of a capacitor of a direct current (DC) link; a detector connected to the shunt resistor and configured to detect the output current; and a controller configured to control a sampling timing of a current in the detector.

Abstract: Disclosed is a managing device for cooling an inverter. The managing device for cooling an inverter includes a fan controller configured to provide an electric current flowing in a cooling fan; and a controller configured to determine whether the current flowing in the cooling fan is out of a preset range, and, when the current is out of the preset range, configured to control the cooling fan with a control voltage different from an operating voltage of the cooling fan.

Abstract: A diagnosing device of a three phase inverter is provided, which includes a relay connected in series with a capacitor disposed on a DC link, an initial charging resistor connected in parallel to the relay, an inverter comprising a switching device for controlling a power supply to three phase output lines, a current sensor disposed on a connection line connecting between the DC link and the inverter to sense a current, and a control unit for driving the switching device and diagnosing at least one of opening and shorting of the switching device according to whether the current is sensed or not.

Abstract: Disclosed herein is an assembly structure for a motor drive unit. An assembly structure for a motor drive unit is disclosed. The assembly structure does not require the time for rotating, laying down, or fastening the components during processes of producing it, so that the time required for production can be shortened. In addition, since no separate fastening part is required, the assembly structure can be simplified and the production costs can be reduced.

Abstract: Disclosed herein is a method for controlling an inverter. The method includes calculating a maximum current from an output current of each phase of the inverter; determining a variable level upper limit by performing a DQ conversion for the output current of each phase of the inverter and adding a change allowable value to the DQ converted output current; determining a difference between the maximum current for each phase and the variable level upper limit as an output frequency attenuation variation, when the output current of the inverter arrives at the variable level upper limit; and determining an output frequency based on the output frequency attenuation variation.