IGBT cascade speed regulation system, control method and control system thereof

A technology of cascade speed regulation and controller, which is applied in the field of winding asynchronous motor cascade speed regulation system and its control system, which can solve problems such as low power factor and achieve strong robustness

Inactive Publication Date: 2014-02-26
SICHUAN EXTREME ELECTRIC CONTROL SYST MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the defects of the prior art, the present invention discloses an IGBT type cascade speed regulation system and a control method for realizing the controller. By using IGBT on the hardware and usin

Method used

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  • IGBT cascade speed regulation system, control method and control system thereof
  • IGBT cascade speed regulation system, control method and control system thereof
  • IGBT cascade speed regulation system, control method and control system thereof

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Embodiment Construction

[0027] Reference attached figure 1 , is the principle diagram of the IGBT type cascade speed regulation system of the present invention, wherein UR is a diode uncontrollable rectifier, the middle module is a Boost boost circuit, and the rear end is an IGBT three-phase fully-controlled bridge inverter circuit, and the inverter transformer T1 will The energy is directed back to the stator side of the motor.

[0028] Among them, the inductor L plays the role of filtering and energy storage, suppressing the pulsation of the rotor current, and reducing the high-order harmonic component of the stator current, and the capacitor C and the diode together form the snubber circuit of the chopper.

[0029] Among them, the working method of the speed control system is as follows:

[0030] Motor rotor voltage:

[0031] u r =sE r0 (1)

[0032] In the formula, S is the slip ratio of the motor; E r0 is the open circuit voltage of the rotor winding.

[0033] The output voltage of the diode

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Abstract

The invention discloses an IGBT type cascade speed regulation system. The circuit structure is that a motor rotor is connected with a diode uncontrollable rectifier, an alternating current is rectified into a direct current; the diode uncontrollable rectifier matches a rectifier side direct current voltage with an inverter side direct current voltage through a Boost chopper circuit, and regulates the rotation speed of the motor; an inverter used at the inverter side is an IGBT fully-controlled bridge, a direct current is converted into an alternating current, and slip power is fed back to a power grid; and finally the inverter side is connected to a motor stator side through a transformer T1. Correspondingly, the invention also discloses a reactive compensation control method and a control system of the abovementioned system, the robustness is strong, the system power factor can be effectively improved and regulation effects of the rotation speed of the motor are good, and energy and electricity are saved.

Description

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Claims

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Application Information

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Owner SICHUAN EXTREME ELECTRIC CONTROL SYST MFG
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