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High-voltage and constant-voltage signal source

A signal source, high voltage technology, applied in the field of power supply, can solve the problems of low volume power consumption power supply devices, etc., and achieve the effects of high precision, light weight and improved accuracy

Inactive Publication Date: 2016-07-27
CHINA CEC ENG
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] At present, the low-voltage motor insulation detection in the existing technology lacks a power supply device with small size, low power consumption, high precision and strong load capacity

Method used

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  • High-voltage and constant-voltage signal source
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  • High-voltage and constant-voltage signal source

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Embodiment Construction

[0016] The present invention is further described below in conjunction with the embodiment of accompanying drawing.

[0017] like figure 1 As shown, the structure of the invention includes a PWM pulse width modulation unit, a pulse transformer, a voltage doubler rectifier unit, a feedback unit, a discharge unit and related control circuits.

[0018] like figure 2 As shown, the circuit of the high voltage constant voltage signal source includes:

[0019] (1) PWM pulse width modulation circuit: pulse width modulation (U1) is the core of the boost circuit, it directly provides the pulse width modulation signal to the switch tube Q3, Q3 drives the step-up transformer, and outputs high-voltage pulses after boosting The voltage is rectified into a DC high voltage output. The pins 5 and 6 are externally connected with an oscillating resistor R13 and a capacitor C9 to determine the switching frequency. Pin 4 is the dead zone control terminal. If the voltage input is 0-4V, the dut...

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PUM

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Abstract

A high-voltage constant-voltage signal source includes a PWM pulse width modulation unit, a pulse transformer, a voltage doubler rectification unit, a feedback unit, a discharge unit and related control circuits. The invention has the advantages of small size, light weight, low power consumption, high precision, etc., and simultaneously has a strong load capacity of 20 GΩ and a low voltage sink value. The main function is to use 15V low voltage to provide a constant voltage source of 500V or 1000V for the motor insulation detection device, so as to meet the requirements of the low-voltage motor insulation automatic monitoring and protection device.

Description

technical field [0001] The invention belongs to the technical field of power supplies and relates to a constant voltage source of 500V or 1000V for a motor insulation detection device by utilizing a 15V low voltage. Background technique [0002] At present, the low-voltage motor insulation detection in the prior art lacks a power supply device with small size, low power consumption, high precision and strong load capacity. Contents of the invention [0003] The purpose of the present invention is to provide a small volume, light weight, low power consumption, high-precision high-voltage constant voltage signal source, using 15V low voltage to provide a 500V or 1000V constant voltage source for the motor insulation detection device, which can be installed in the low-voltage distribution In the narrow space in the electric cabinet or some drawer cabinets, it can meet the automatic monitoring and protection of the insulation of low-voltage motors. [0004] Invented technical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33523
Inventor 魏丽君曾博淳罗喜李友红章雯
Owner CHINA CEC ENG
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