CN205017242U

CN205017242U - AC servo driver with intelligence function of releasing

Info

Publication number: CN205017242U
Application number: CN201520658651.XU
Authority: CN
Inventors: 王献伟; 徐东桂; 林荣峰
Original assignee: GUANGZHOU WEIDE ELECTRICAL MACHINERY CO Ltd
Current assignee: GUANGZHOU WEIDE ELECTRICAL MACHINERY CO Ltd
Priority date: 2015-08-28
Filing date: 2015-08-28
Publication date: 2016-02-03
Anticipated expiration: 2025-08-28

Abstract

The utility model discloses a AC servo driver with intelligence function of releasing mainly includes electric network source input, motor link, dc -to -ac converter, generating line sampling circuit and corresponds the circuit of releasing that generating line sampling circuit set up, and generating line sampling circuit is including the rectifier bridge, with BUS capacitors and the generating line that the rectifier bridge switched on, the generating line through the divider resistance subassembly with release the line connection, the circuit of releasing is including switching on switch, bleeder pipe and drain resistor, still is equipped with voltage comparater and CPLD control assembly at divider resistance between the circuit with releasing, thereby its CPLD control assembly is through the voltage ratio of receiving voltage comparater and conveying than the control of signal to switching on the switch and switching on and open circuit. This AC servo driver with intelligence function of releasing utensil adopts CPLD to carry out the logic control who releases, guarantees that the bleeder pipe is in in the normal working range to power rating to releasing is monitored.

Description

There is the AC servo driver of intelligent drainage function

Technical field

The utility model relates to servo-drive, particularly a kind of AC servo driver with intelligent drainage function.

Background technology

Existing servo is released control circuit, after busbar voltage raises, can release timely, busbar voltage can be adjusted to a rational level.But from schematic diagram, switching tube of releasing open closedown, controlled by the comparator circuit of hardware completely, as long as busbar voltage one exceedes threshold value of releasing, at once will open switch of releasing; As long as busbar voltage is lower than threshold value of releasing, then close switch of releasing, therefore, the frequency of releasing, releasing the time of single cycle is all uncontrollable, determined by the voltage of bus completely, but bleeder pipe generally adopts IGBT, it has fixing opens the turn-off time, and therefore its switching frequency is generally no more than 20KHz.Therefore, once frequency of releasing is more than 20KHz, or when releasing, the shut-in time is not enough, then bleeder pipe can be caused to damage.Very frequent if released in addition, also can there is cause thermal damage in driver.

Utility model content

The utility model mainly provides a kind of frequency to releasing, cycle, power are monitored, and to protect bleeder pipe, and carries out heat management, makes driver that the AC servo driver with intelligent drainage function of cause thermal damage not occur.

In order to reach above-mentioned purpose of design, the technical solution adopted in the utility model is as follows:

A kind of AC servo driver with intelligent drainage function, mainly comprise electric network source input, motor link, inverter, the circuit of releasing that bus sample circuit and corresponding bus sample circuit are arranged, it is characterized in that: bus sample circuit includes rectifier bridge, with bus capacitor and the bus of rectifier bridge conducting, bus is by divider resistance assembly and connection of releasing, described circuit of releasing comprises actuating switch, bleeder pipe and bleeder resistance, at divider resistance and release between circuit and be also provided with voltage comparator and CPLD control assembly, the voltage comparison signal that its CPLD control assembly is transmitted by receiver voltage comparator thus actuating switch is carried out to the control of conducting and open circuit.

Further, described divider resistance assembly comprises at least two divider resistances of connecting with bus.

Further, the bleeder pipe of releasing in circuit is a kind of igbt.

The beneficial effect with the AC servo driver of intelligent drainage function described in the utility model is: bus sample circuit carries out voltage by circuit of releasing and releases, the release path of circuit and open circuit controls by by CPLD, the control of the detection that CPLD completes signal of releasing, the PWM Duty ratio control of releasing, frequency of releasing, and accumulate number of times detection of releasing.When number of times of releasing exceedes certain value within the short period, as fault alarm process of releasing; When number of times accumulation of releasing exceedes certain number of times, as power overload alert process of releasing, to avoid cause thermal damage.

Accompanying drawing explanation

Fig. 1 is the circuit turn-on schematic diagram of the utility model median generatrix sample circuit and circuit of releasing.

Embodiment

Below in conjunction with Figure of description, embodiment of the present utility model is described in detail.Obviously, described embodiment is only a part of embodiment of the present utility model, and other embodiment that those skilled in the art obtains under the prerequisite not paying creative work all belongs to protection range of the present utility model.

The AC servo driver of what the utility model provided have intelligent drainage function, mainly comprise electric network source input, motor link, inverter, the circuit of releasing that bus sample circuit and corresponding bus sample circuit are arranged, bus sample circuit includes rectifier bridge 1 as shown in Figure 1, with bus capacitor 2 and the bus 3 of rectifier bridge conducting, bus 3 is connected with circuit 5 of releasing by divider resistance assembly 4, described circuit 5 of releasing comprises actuating switch 51, bleeder pipe 52 and bleeder resistance 53, at divider resistance assembly 4 and release between circuit 5 and be also provided with voltage comparator 6 and CPLD control assembly 7, the voltage comparison signal that its CPLD control assembly 7 is transmitted by receiver voltage comparator 6 thus actuating switch 51 is carried out to the control of conducting and open circuit.

As preferably, described divider resistance assembly comprises at least two divider resistances of connecting with bus.

As preferably, the bleeder pipe of releasing in circuit is a kind of igbt.

To release flow process:

The alternating current of power supply is by forming direct current after rectifier bridge rectification, and part of direct current is sent to inverter through bus capacitor; Another part direct current is through bus, the voltage of bus is detected carrying out voltage by least 2 divider resistances, analytical calculation magnitude of voltage is carried out again by voltage comparator, voltage comparator threshold value is arranged by CPLD, if exceed rated voltage (310V-370V) CPLD to start actuating switch, the circuit of Based Intelligent Control actuating switch conducting bleeder pipe and bleeder resistance, is released by bleeder pipe and bleeder resistance and exceedes the voltage of nominal threshold value.

Last it is noted that above embodiment is only for illustration of the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.

Claims

1. one kind has the AC servo driver of intelligent drainage function, mainly comprise electric network source input, motor link, inverter, the circuit of releasing that bus sample circuit and corresponding bus sample circuit are arranged, it is characterized in that: bus sample circuit includes rectifier bridge, with bus capacitor and the bus of rectifier bridge conducting, bus is by divider resistance assembly and connection of releasing, described circuit of releasing comprises actuating switch, bleeder pipe and bleeder resistance, at divider resistance and release between circuit and be also provided with voltage comparator and CPLD control assembly, the voltage comparison signal that its CPLD control assembly is transmitted by receiver voltage comparator thus actuating switch is carried out to the control of conducting and open circuit.

2. the AC servo driver with intelligent drainage function according to claim 1, is characterized in that: described divider resistance assembly comprises at least two divider resistances of connecting with bus.

3. the AC servo driver with intelligent drainage function according to claim 1, is characterized in that: the bleeder pipe of releasing in circuit is a kind of igbt.