DC (direct current) feed type motor energy saving device

An energy-saving device and power feeding technology, applied in the direction of electric energy storage system, electrical components, etc., can solve the problems affecting the quality of the power grid, high cost, harmonic interference of the power grid, etc., and achieve the effect of guaranteeing the quality of the power grid, simple structure and low cost

Inactive Publication Date: 2012-10-10
扬州华泰电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some motor drive systems adopt the power feedback method, that is, the energy absorbed from the grid is provided to the motor, and at the same time, the power generated when the motor is working as a generator can be fed back to the grid. Synchronous inverters feed back energy to the grid. The disadvantage is that when feeding back energy to the grid, it will cause harmonic interference to the grid, affecting the quality of the grid. At the same time, the control is complicated and the cost is high.

Method used

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  • DC (direct current) feed type motor energy saving device

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Embodiment Construction

[0008] Such as figure 1 As shown, the present invention is mainly composed of a motor controller 2 with a DC bus, a bidirectional DC / DC converter 6, a supercapacitor 7 and a detection control circuit 4;

[0009] The AC input terminal of the motor controller 2 with the DC bus 5 is connected to the grid AC bus 1 , and its output terminal is connected to the motor 3 , which is used to provide electric energy from the grid AC bus 1 to the motor 3 .

[0010] The high-voltage end of the bidirectional DC / DC converter 6 is connected to the DC bus 5 of the motor controller 2, and its output end is connected to the supercapacitor 7. After the / DC converter 6 is regulated, the supercapacitor 7 stores energy. When the motor 3 returns to the motor state, the bidirectional DC / DC converter 6 feeds back the electric energy stored in the supercapacitor 7 to the DC bus 5 of the motor controller 2 to realize power-saving control of the motor 3 .

[0011] The detection control circuit 4 is r...

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Abstract

The invention discloses a DC (direct current) feed type motor energy saving device and belongs to the field of motor drive application. The device comprises a motor controller with a DC bus, a bidirectional DC/DC converter, a super capacitor and a detection control circuit, wherein the AC (alternating current) input end of the motor controller is connected to a power grid AC bus; the output end of the motor controller is connected with the motor; the high-voltage end of the bidirectional DC/DC converter is connected with the DC bus of the motor controller; the low-voltage end of the bidirectional DC/DC converter is connected with the super capacitor; and the detection control circuit is connected with the DC bus of the motor controller, the power grid AC bus and the bidirectional DC/DC converter respectively. The device disclosed by the invention is simple and reasonable, can be used for realizing power saving, preventing harmonic interference on the power grid and guaranteeing the quality of the power grid, and is low in cost.

Description

technical field [0001] The invention belongs to the field of motor drive applications. Background technique [0002] The motor drive system is a very widely used component, which plays an indispensable role in the national economy and the people's livelihood. In some specific applications, the motor works in the state of alternating motor / generator, and the motor generated when the motor works in the state of generator Electric energy is wasted in vain. At present, some motor drive systems adopt the power feedback method, that is, the energy absorbed from the grid is provided to the motor, and at the same time, the power generated when the motor is working as a generator can be fed back to the grid. Synchronous inverters feed back energy to the grid. The disadvantage is that when feeding back energy to the grid, it will cause harmonic interference to the grid, affecting the quality of the grid. At the same time, the control is complicated and the cost is high. Contents of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J15/00
Inventor 高从兵
Owner 扬州华泰电子有限公司
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