Control method for alternating current solid-state power switch

A solid-state power switch, solid-state switch technology, applied in electronic switches, electrical components, pulse technology, etc., can solve the problems of many triggering times, large voltage drop of thyristor on-state, high power consumption, etc. The effect of low power consumption

Inactive Publication Date: 2010-03-03
SHANGHAI AVIATION ELECTRIC
View PDF0 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention relates to a control method of an AC solid-state power switch, which solves the problems in the prior art such as large voltage drop when the silicon controlled rectifier is turned on, high power consumption, and many trigger times.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Control method for alternating current solid-state power switch
  • Control method for alternating current solid-state power switch
  • Control method for alternating current solid-state power switch

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0033] The specific embodiment design circuit is as follows:

[0034] Set the control signal input terminal for inputting the on / off control signal; set the isolated power supply;

[0035]A positive control switch and a negative control switch are set, the isolated power supply ground is connected to the source of the negative control switch, the AC power supply is connected to the drain of the negative control switch, and the drain of the positive control switch is grounded through the AC load;

[0036] A bidirectional voltage transient controller, a current sampling resistor and a load current polarity sampling circuit module are arranged between the positive control switch and the negative control switch. The drain of the switch is connected, the two ends of the current sampling resistor are respectively connected with the source of the positive control switch and the source of the negative control switch, and the load current polarity sampling circuit module is connected w...

Embodiment 2

[0038] Set the line voltage polarity sampling circuit module and the load current polarity sampling circuit module, the line voltage polarity sampling circuit module is connected to the AC power supply, and the line voltage polarity sampling circuit detects the AC between the input terminal Vin of the AC power supply and the ground of the AC power supply Voltage polarity (as attached figure 1 Embodiment 1), or detect the polarity of the AC voltage between the input terminal Vin of the AC power supply and the output Vout of the AC power (as attached Figure 5 Embodiment 2);

[0039] The first logic gate circuit 14 is set, the input terminal of the first logic gate circuit is connected with the load current polarity sampling circuit module, the input terminal of the first logic gate circuit is connected with the line voltage polarity sampling circuit module, and the first logic gate circuit The output end of the circuit is connected with the clock signal interface of the positi...

Embodiment 1

[0041] Embodiment 1 is a control method for an AC solid-state power switch with two logic gate circuits each having a multiplier and an adder. Embodiment 2 is a control method of an AC solid-state power switch with two logic gate circuits each having an adder.

[0042] figure 1 It is a control principle block diagram of Embodiment 1 of the present invention.

[0043] The source of the positive control switch and the source of the negative control switch are respectively connected to the load current polarity sampling circuit module, and the load current polarity sampling circuit module is respectively connected to the input terminals of two logic gate circuits, and the two logic gate circuits The output terminal of the positive control D-type flip-flop is connected with the clock signal interface of the negative-control D-type flip-flop, the AC power supply is connected with the line voltage polarity sampling circuit module, and the line voltage polarity sampling circuit modu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a control method for an alternating current solid-state power switch. The method comprises two solid-state switch MOSFETs which are in back-to-back connection, a load current polarity sampling circuit, a line voltage polarity sampling circuit, a D-type trigger, a logic gate circuit and an isolated power supply; and the control method is characterized by comprising the following steps: detecting the changes of the voltage polarity or the current polarity of a load circuit; latching opening/closing control signals by the D-type trigger; and switching on or off the two solid-state switches so as to switch on or off a power supply circuit of an alternating current load. The control method for the alternating current solid-state power switch has the advantages of achieving the switch-on and switch-off controls of an alternating current electric load and having the characteristics of one triggering, natural zero-crossing switch-on and switch-off, no generation of electromagnetic interferences, and low switch power consumption.

Description

technical field [0001] The invention relates to a control method of a solid-state power switch for AC electrical load control. Background technique [0002] In the current electromechanical control method and AC power distribution system, there are generally two ways to control the switching of AC electrical loads: one is through traditional electromechanical electromagnetic relays, circuit breakers, contactors or mechanical electrical switches; the other is is the use of solid state power electronic switches such as solid state relays. In the AC power supply system, in order to reduce the electromagnetic interference to the power supply system and the environment when the solid-state power switch is turned on and off, the control method is required to make the solid-state power switch turn on when the line voltage crosses zero and turn off when the line current crosses zero. function. The solid-state power switch commonly used at present is a bidirectional thyristor, equi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/687
Inventor 袁旺
Owner SHANGHAI AVIATION ELECTRIC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap