Permanent magnet portal crane frequency converter

A frequency converter and magnetic door machine technology, applied in the field of permanent magnetic door machine frequency converter, can solve the problems of high cost, large filter capacitor value, expensive filter capacitor, etc.

Pending Publication Date: 2020-04-21
展鹏科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the inverter circuit topology commonly used in the market, a high-voltage scheme is used to drive a high-voltage motor, such as a 220V motor, but this method requires a larger capacitance value of the filter capacitor in the inverter circuit topology, and The filter capacitor with larger

Method used

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  • Permanent magnet portal crane frequency converter
  • Permanent magnet portal crane frequency converter
  • Permanent magnet portal crane frequency converter

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Embodiment

[0034] The embodiment of the present invention discloses a permanent magnet door machine frequency converter, such as figure 1 shown, including: bridge rectifier (such as figure 1 D1 in), the first filter (such as figure 1 C1 in), high frequency DC chopper (such as figure 1 A1 in), the secondary rectifier (such as figure 1 B1 in ), the second filter (such as figure 1 C2 in), three-phase switching bridge arm (such as figure 1 in Q1-Q6); where,

[0035] In a specific embodiment, in order to filter better, such as figure 1 As shown, both the first filter and the second filter are electrolytic capacitors.

[0036] In a specific example, such as figure 1 As shown, the secondary rectifier includes: a rectifier diode.

[0037] Specifically, the rectifier bridge is divided into a full bridge and a half bridge. In this solution, it is a full bridge. The specific full bridge is composed of 4 rectifier diodes connected in the form of a bridge full-wave rectifier circuit and packa...

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PUM

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Abstract

The invention provides a permanent magnet portal crane frequency converter. The permanent magnet portal crane frequency converter comprises a rectifier bridge, a first filter, a high-frequency direct-current chopper, a secondary rectifier, a second filter and a three-phase switch bridge arm; the input end of the rectifier bridge is connected with external mains supply; the output end of the rectifier bridge is connected with the anode of the first filter; the cathode of the first filter is grounded; the anode of the first filter is connected with an external high-voltage bus and the input endof the high-frequency direct-current chopper; the output end of the high-frequency direct-current chopper is connected with the anode of the secondary rectifier; the cathode of the secondary rectifieris connected with an external low-voltage bus, the anode of the second filter and the input end of the three-phase switch bridge arm; and the output end of the three-phase switch bridge arm is connected with an external low-voltage permanent magnet synchronous motor. By means of the high-frequency direct-current chopper, the influence of pulsating voltage is overcome; a filter capacitor with a small capacitance value can be selected; the area of a high-voltage part in a whole controller is controlled; the miniaturization of the frequency converter is facilitated; overall cost is reduced; andrequirements for application environments are lowered.

Description

technical field [0001] The invention relates to the field of elevator frequency converters, in particular to a permanent magnet door machine frequency converter. Background technique [0002] In the elevator door machine control system, it is necessary to use the frequency converter to control the motor to perform frequent forward and reverse, acceleration and deceleration start and stop movements. [0003] In the inverter circuit topology commonly used in the market, a high-voltage scheme is used to drive a high-voltage motor, such as a 220V motor, but this method requires a larger capacitance value of the filter capacitor in the inverter circuit topology, and The filter capacitor with larger capacitance is more expensive, resulting in higher cost. In addition, due to the high-voltage scheme adopted, the required components also need to withstand high voltage, which leads to higher overall cost and is not suitable for the applied The environmental requirements are also rel...

Claims

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Application Information

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IPC IPC(8): H02P6/10H02P27/08
CPCH02P6/10H02P27/08
Inventor 钟加镇夏静
Owner 展鹏科技股份有限公司
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