Delta Electronics, Inc.

Yi-Kai Chou

Te-Wei Yuan

Yi-Jan Chang

Yu-Jen Chen

Hsueh-Kuo Liao

Yu-Ling Lee

Chien-Yu Tseng

Wei-Hao Chi

Ming-Yuan Tsai

Po-Sung Chiang

Bo-Jheng Lin

Chien-Hao Chen

A motor drive system and a control method are provided. The motor drive system is electrically connected to a motor. The motor drive system includes two safe torque off (STO) modules to achieve a two-channel STO redundancy infrastructure, so as to improve the safety of the motor drive system. In addition, the motor drive system includes a diagnosis module to diagnose malfunction of the STO modules. It ensures the STO modules to meet the related safety requirements.

Motor drive system and control method therefor

A voltage detecting circuit includes a rectifying circuit, a voltage dividing circuit, and a comparing circuit. The rectifying circuit is configured to rectify a plurality of AC phase voltages to output a plurality of rectified voltages respectively. The voltage dividing circuit is configured to divide the plurality of rectified voltages respectively to output a plurality of sampling voltages. The comparing circuit is configured to compare the plurality of sampling voltages with a reference voltage respectively to provide a plurality of corresponding phase failure detecting voltages. On the condition that the AC phase voltages are unbalanced, the phase failure detecting voltage switches between a high level and a low level.

Voltage detecting circuit

An integrated power module packaging structure includes a plastic housing having a cavity; a plurality of step-shaped pins embedded in the plastic housing, a first printed circuit board disposed in the cavity, and a second printed circuit board disposed above the first printed circuit board in the cavity. Each of the step-shaped pins includes a first L-shaped bending portion and a second L-shaped bending portion connected to each other. The first printed circuit board is disposed with at least a power device and is electrically connected to at least a part of the first L-shaped bending portions. Two opposite surfaces of the second printed circuit board are respectively disposed with at least an electronic device, and the second printed circuit board is electrically connected to at least a part of the second L-shaped bending portions.

Integrated power module packaging structure

A method for detecting failure of soft start includes: connecting a variable frequency device to a load; detecting an energy storage unit at a first voltage level; generating an output current to the load; detecting the energy storage unit changed from the first voltage level into a second voltage level; generating a reference voltage value according to the output current and determining whether a voltage difference value between the first voltage level and the second voltage level is larger than the reference voltage value; determining whether a voltage peak-to-peak value of the energy storage unit is smaller than a set value by the controller if the voltage difference value is larger than the reference voltage value; and controlling the inverter circuit to stop outputting the output current to the load if the voltage peak-to-peak value is smaller than the set value.

Method for detecting failure of soft start and variable frequency device

A power converter apparatus for driving an electronic load is disclosed. The power converter apparatus includes a rectifier module, an active switch unit, a driving module, an input voltage detection module, an output voltage detection module, a current detection module and a digital processor module. The active switch unit is shunt connected to the electronic load. The input voltage detection module is used for sampling out an input sampled voltage waveform. The output voltage detection module is used for sampling out an output sampled voltage waveform. The current detection module is used for sampling out a practical input current waveform. The digital processor module generates a current reference command according to the input sampled voltage waveform and the output sampled voltage waveform. The digital processor module dynamically switches the active switch unit according to the current reference command and the practical input current waveform.

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Taoyuan, Taiwan

Yi-Kai Chou