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Inverter and its control unit

A control unit and inverter technology, which is applied in the direction of AC motor control, control system, and AC power input conversion to AC power output, etc., can solve the problems of energy consumption, energy waste, and temperature rise of inverters by bleeder resistors. Achieve the effect of reducing loss, improving system reliability, and intuitive discharge process

Active Publication Date: 2018-11-23
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this way, no matter in what state, as long as there is voltage on the DC bus, energy will be consumed on the bleeder resistor, thereby causing energy waste, and the heat generated by the bleeder resistor will increase the internal temperature of the converter

Method used

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  • Inverter and its control unit
  • Inverter and its control unit

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Embodiment Construction

[0031] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] combine first figure 2 The inverter and its control unit of the present invention will be described. figure 2 A converter including a control unit according to a preferred embodiment of the invention is shown. Such as figure 2 As shown, the converter includes a circuit part 1 and a control unit 2 . Said circuit part comprises the rectification part 1...

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Abstract

The invention provides a converter and a control unit thereof. The control unit of the converter comprises a control module, a rectification side voltage / current sensor, a first power supply, and a second power supply. The rectification side voltage / current sensor is used to detect the voltage or current of the rectification part of the converter. The first power supply is used to supply power for the control module when the converter works normally. The second power supply is used to supply power for the control module when the power of the converter is cut off. When the control module determines that the power of the converter is cut off according to the voltage or current detected by the rectification side voltage / current sensor, the control module switches the power supply from the first power supply to the second power supply. When the converter works normally, a discharge circuit is not connected, and the system reliability is improved. Furthermore, through adding a discharge indicator light, the indicator light is turned on when the discharge circuit works and is turned off when discharging is completed, so that the discharging process is more obvious.

Description

technical field [0001] The invention relates to the technical field of electronic power, in particular to a converter and a control unit thereof. Background technique [0002] The main topology of the converter used in the high-power frequency conversion centrifuge unit usually adopts the "AC-DC-AC" structure. AC input, the DC potential is established through the rectification part, and a larger capacitor is connected to the intermediate link, that is, the DC bus for energy storage. Its main structure is as follows: figure 1 shown. [0003] Wherein, when the converter is working, a relatively high voltage is established on the DC bus, and when the converter stops, the remaining voltage on the DC bus needs to be discharged through a discharge circuit, otherwise there will be potential safety hazards. Such as figure 1 As shown, the solution adopted is to directly connect the bleeder resistors at both ends of the DC bus to realize this function. However, in this way, no mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/458H02P27/08
CPCH02M5/458H02P27/08
Inventor 陈宁宁徐金辉蒋世用刘克勤冯重阳王京
Owner GREE ELECTRIC APPLIANCES INC
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