CN218850657U

CN218850657U - High driver braking circuit of security

Info

Publication number: CN218850657U
Application number: CN202223033157.3U
Authority: CN
Inventors: 袁炜彬; 郭继亮; 王青华; 梁伟东
Original assignee: Dongguan Smartwin Intelligent Equipment Co ltd
Current assignee: Dongguan Smartwin Intelligent Equipment Co ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-04-11
Anticipated expiration: 2032-11-14

Abstract

The utility model relates to a servo driver technical field especially indicates a high driver braking circuit of security, including drive controller U1 and braking module, the braking module includes signal reception unit, signal transmission unit and braking control unit; the input end of the signal receiving unit is in signal connection with the driving controller U1, the control end of the signal transmitting unit is in signal connection with the output end of the signal receiving unit, and the output end of the signal transmitting unit is in signal connection with the control end of the brake control unit; the driving controller U1 is provided with a U driving end, a V driving end and a W driving end, and the U driving end, the V driving end and the W driving end are respectively connected with a three-phase driving input end of an external motor. The utility model discloses a three-phase drive input of brake control unit control motor short circuit each other for the motor converts the generator into, provides the back electromotive force and makes the resistance for the motion unit, and the real braking effect that makes.

Description

High driver braking circuit of security

Technical Field

The utility model belongs to the technical field of the servo driver technique and specifically relates to indicate a high driver braking circuit of security.

Background

With the development of automation and artificial intelligence, servo driving also becomes a new growth point of the industry, and the linear motor application industry is applied to more industries and scenes, and the problem of emergency stop of the linear motor is more and more prominent. As shown in fig. 1, the current linear motor module is the lug connection servo driver and carries out motion control, when emergency appears, the motion unit can only stop by mechanical spacing because of the condition of free motion appears in inertia, the condition of heavy load, inertia can lead to the striking dynamics bigger, if so unusual, only stop linear motor module (for example car) by mechanical spacing, accident then appears easily, prevent accident through the distance of adjustment braking, also can not guarantee certainly to avoid appearing the accident.

SUMMERY OF THE UTILITY MODEL

The utility model discloses problem to prior art provides a high driver braking circuit of security, and the three-phase drive input through braking the control unit control motor short circuit each other for the motor converts the generator into, then can produce the counter electromotive force and make the resistance for the motion structure that the motor is connected when the motor appears coasting, thereby plays the effect of braking, can effectively shorten the distance of coasting, reduces the incidence of accident.

In order to solve the technical problem, the utility model discloses a following technical scheme: a driver braking circuit with high safety comprises a driving controller U1 and a braking module, wherein the braking module comprises a signal receiving unit, a signal transmitting unit and a braking control unit; the input end of the signal receiving unit is in signal connection with the driving controller U1, the control end of the signal transmitting unit is in signal connection with the output end of the signal receiving unit, and the output end of the signal transmitting unit is in signal connection with the control end of the brake control unit; the driving controller U1 is provided with a U driving end, a V driving end and a W driving end, the U driving end, the V driving end and the W driving end are respectively connected with a three-phase driving input end of an external motor, and the braking control unit is used for enabling the U driving end to be in signal connection or disconnection with the V driving end and the W driving end.

Preferably, the brake control unit comprises a relay RLY2, two ends of a coil of the relay RLY2 are connected with the output end of the external voltage and the output end of the signal transmission unit respectively, the relay RLY2 comprises a first normally open switch and a second normally open switch, two normally open contacts of the first normally open switch are connected with the U driving end and the W driving end respectively, and two normally open contacts of the second normally open switch are connected with the V driving end and the W driving end respectively.

Preferably, the brake control unit further includes a diode D11, two ends of a coil of the relay RLY2 are respectively connected to two ends of the diode D11, a cathode of the diode D11 is connected to an external voltage, and an anode of the diode D11 is connected to an output terminal of the signal transmission unit.

Preferably, the signal receiving unit includes a switching tube PC7, a zener diode DZ10 and a resistor R88, the control signal is connected to the anode of the zener diode DZ10 through the resistor R88, the cathode of the zener diode DZ10 is connected to the first control terminal of the switching tube PC7, the second control terminal of the switching tube PC7 is connected to the external voltage, one switching terminal of the switching tube PC7 is connected to the external voltage, and the other switching terminal of the switching tube PC7 is connected to the control terminal of the signal transmitting unit through the resistor R87.

Preferably, the signal transmission unit includes a switch tube Q4 and a resistor R89, two ends of the resistor R89 are respectively connected to the control end of the switch tube Q4 and a switch end of the switch tube Q4, the control end of the switch tube Q4 is connected to the output end of the signal receiving unit, one switch end of the switch tube Q4 is grounded, and the other switch end of the switch tube Q4 is connected to the control end of the brake control unit.

Preferably, the driver braking circuit with high safety further comprises a current protection detection module, and the current protection detection module is used for judging whether the current at the driving end of the motor is normal or not.

Preferably, the current protection detection module includes a detection resistor R12 and a detection resistor R25, the U driving end of the drive controller U1 is connected to the driving end of the external motor through the detection resistor R12, the W driving end of the drive controller U1 is connected to the driving end of the external motor through the detection resistor R25, and one end of the detection resistor R12 and one end of the detection resistor R25 are respectively connected to the signal acquisition end of the drive controller U1.

The utility model has the advantages that:

the utility model provides a high driver braking circuit of security, when there is not the abnormal occurrence, then the braking control unit is out of work, drive controller U1's U drive end, V drive end and W drive end, between the three drive ends nonconducting, that is to say between the three-phase drive input end of motor nonconducting, the motor can normally work and control the motion unit action; when the motor slides, mechanical energy generated by sliding can be converted into electric energy, namely counter electromotive force is generated to generate resistance for a motion unit connected with the motor, and therefore the braking effect is achieved. Compare in the mechanical braking mode among the prior art, the utility model discloses can increase the effect of braking through the effect that changes the motor to can effectively improve braking effect, reduce the distance that slides of motion unit, reduce the possibility of occurence of failure.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic structural view of the present invention;

fig. 3 is a schematic circuit diagram of the present invention.

The reference numerals in fig. 1 to 3 include:

the device comprises a signal receiving unit 1, a signal transmitting unit 2, a brake control unit 3 and a current protection detection module 4.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention will be described in detail with reference to the accompanying drawings.

The first embodiment is as follows:

the driver braking circuit with high safety provided by this embodiment, as shown in fig. 2 to 3, includes a driving controller U1 and a braking module, where the braking module includes a signal receiving unit 1, a signal transmitting unit 2 and a braking control unit 3; the input end of the signal receiving unit 1 is in signal connection with the driving controller U1, the control end of the signal transmitting unit 2 is in signal connection with the output end of the signal receiving unit 1, and the output end of the signal transmitting unit 2 is in signal connection with the control end of the brake control unit 3; the driving controller U1 is provided with a U driving end, a V driving end and a W driving end, the U driving end, the V driving end and the W driving end are respectively connected with a three-phase driving input end of an external motor, and the braking control unit 3 is used for enabling the U driving end to be in signal connection or disconnection with the V driving end and the W driving end.

In the prior art, the linear motor is generally directly connected with the servo driver, so that when an emergency brake occurs, the servo driver stops driving, but the motion unit connected with the linear motor still continues to slide due to inertia, and the sliding excitation distance is uncontrollable under the situation, so that personnel injuries, equipment damages and the like are easily caused. Specifically, as shown in fig. 2 to 3, when there is no abnormality, the brake control unit 3 does not operate, the three driving ends, i.e., the three-phase driving input end of the motor, are not conducted, and the motor can normally operate to control the motion unit; when an abnormality occurs, the signal receiving unit 1 receives a relevant signal and transmits the signal through the signal transmission unit 2, so that the brake control unit 3 works, the U driving end, the V driving end and the W driving end of the driving controller U1 are conducted with each other, namely, the three-phase driving input end of the motor is conducted, the motor is converted into a generator, mechanical energy generated by sliding can be converted into electric energy when the motor slides, namely, counter electromotive force is generated to generate resistance for a motion unit connected with the motor, and the effect of braking is achieved. Compare in the mechanical braking mode among the prior art, the utility model discloses can increase the effect of braking through the effect that changes the motor to can effectively improve braking effect, reduce the distance that slides of motion unit, reduce the possibility of occurence of failure.

The signal receiving unit 1 can selectively comprise a switch tube PC7, a voltage stabilizing diode DZ10 and a resistor R88, the switch tube PC7 can be selected as an optical coupler, the signal transmission unit 2 comprises a switch tube Q4 and a resistor R89, the switch tube Q4 can be selected as a triode or an MOS tube, the brake control unit 3 can selectively comprise a relay RLY2 and a diode D11, and the connection principle of the signal receiving unit 1, the signal transmission unit 2 and the brake control unit 3 is as shown in figures 2 to 3. The control signal for controlling the optocoupler PC7 may be a signal output by the drive controller U1, or may be a signal output by an external controller, for example, when the external controller detects that a motion unit connected to the linear motor normally moves, the control signal output by the external controller causes the optocoupler to be non-conductive, the switch tube Q4 is also non-conductive, the first normally-open switch and the second normally-open switch of the relay RLY2 are in an open state, so that the UVW three-phase input drive end of the motor is not conductive, the motor and the motion unit normally operate, when the external controller detects that an abnormal signal such as an emergency brake occurs, the drive controller U1 stops driving the motor, the external controller outputs a control signal to the optocoupler PC7 to cause the optocoupler to be conductive, the switch tube Q4 is also conductive, the diode D11 is turned off at this time, so that the coil of the relay RLY2 is energized, the first normally-open switch and the second normally-open switch are both closed, and according to the connection mode shown in fig. 2 to fig. 3, the UVW drive input end is turned on, so that the motor is converted into an electric energy in the sliding process of converting the mechanical energy into an electric energy, that a counter electromotive force is generated to make the motion unit, thereby achieving the purpose of the motion unit. Of course, the control signal of the optocoupler of the present embodiment may also be generated by driving the controller U1. In addition, the double switch design of opto-coupler and switch tube Q4 can be so that this embodiment is more accurate to relay RLY 2's control, and double switch can avoid appearing the mistake and touch, the condition of mistake trigger relay RLY 2.

Further, this embodiment still is provided with current protection detection module 4 of motor, whether current protection detection module 4 optional current that is used for detecting the U drive end and the W drive end is normal, specifically including detection resistance R12 and detection resistance R25, as shown in fig. 2 to 3, drive controller U1's U drive end is connected with the drive end of external motor through detection resistance R12, drive controller U1's W drive end is connected with the drive end of external motor through detection resistance R25, the one end of detection resistance R12 and the one end of detection resistance R25 are connected with drive controller U1's signal acquisition end respectively.

Specifically, if the drive controller U1 is not normally connected to the motor, the enable signal is output, and the drive controller U1 is burnt out, so that the current signal at the UVW driving end is detected before the motor is enabled to determine whether the drive controller U1 is connected to the motor. During normal work, relay RLY2 is in the state of normally opening, and external control ware or drive controller U1 detects through the electric current to detecting resistance R12 and detecting resistance R25 this moment, and unusual appears when measuring current, then drive controller U1 does not enable the motor, and U drive end, V drive end and W drive end do not have drive signal output promptly, and the motor is out of work to the protection motor.

Example two:

the high driver braking circuit of security that this embodiment provided, the braking control unit 3 of this embodiment includes two triodes (or MOS pipe), be connected to the output of signal transfer unit 2 with the base of two triodes, be connected to U drive end and W drive end respectively with the collecting electrode and the projecting pole of a triode, be connected to V drive end and W drive end respectively with the collecting electrode and the projecting pole of another triode, when control signal made two triodes switch on, then just can switch on between U drive end and V drive end and the W drive end equally, realize the purpose of converting the motor into the generator.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention is disclosed in the above description in terms of preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art will be able to make any changes or modifications to equivalent embodiments without departing from the scope of the present invention, and all the technical solutions of the present invention are within the scope of the present invention.

Claims

1. A high driver braking circuit of security characterized in that: the brake system comprises a driving controller U1 and a brake module, wherein the brake module comprises a signal receiving unit, a signal transmitting unit and a brake control unit; the input end of the signal receiving unit is in signal connection with the driving controller U1, the control end of the signal transmitting unit is in signal connection with the output end of the signal receiving unit, and the output end of the signal transmitting unit is in signal connection with the control end of the brake control unit;

the driving controller U1 is provided with a U driving end, a V driving end and a W driving end, the U driving end, the V driving end and the W driving end are respectively connected with a three-phase driving input end of an external motor, and the braking control unit is used for enabling the U driving end to be in signal connection or disconnection with the V driving end and the W driving end.

2. The driver braking circuit with high safety as set forth in claim 1, wherein: the brake control unit comprises a relay RLY2, two ends of a coil of the relay RLY2 are connected with the output end of an external voltage and signal transmission unit respectively, the relay RLY2 comprises a first normally-open switch and a second normally-open switch, two normally-open contacts of the first normally-open switch are connected with the U driving end and the W driving end respectively, and two normally-open contacts of the second normally-open switch are connected with the V driving end and the W driving end respectively.

3. The driver braking circuit with high safety as set forth in claim 2, wherein: the brake control unit further comprises a diode D11, two ends of a coil of the relay RLY2 are respectively connected with two ends of the diode D11, a cathode of the diode D11 is connected with external voltage, and an anode of the diode D11 is connected with an output end of the signal transmission unit.

4. The driver braking circuit with high safety as set forth in claim 1, wherein: the signal receiving unit comprises a switch tube PC7, a voltage stabilizing diode DZ10 and a resistor R88, a control signal is connected with the anode of the voltage stabilizing diode DZ10 through the resistor R88, the cathode of the voltage stabilizing diode DZ10 is connected with the first control end of the switch tube PC7, the second control end of the switch tube PC7 is connected with external voltage, one switch end of the switch tube PC7 is connected with the external voltage, and the other switch end of the switch tube PC7 is connected with the control end of the signal transmission unit through the resistor R87.

5. The driver braking circuit with high safety as set forth in claim 1, wherein: the signal transmission unit comprises a switch tube Q4 and a resistor R89, the two ends of the resistor R89 are respectively connected with the control end of the switch tube Q4 and a switch end of the switch tube Q4, the control end of the switch tube Q4 is connected with the output end of the signal receiving unit, one switch end of the switch tube Q4 is grounded, and the other switch end of the switch tube Q4 is connected with the control end of the brake control unit.

6. The driver braking circuit with high safety as set forth in claim 1, wherein: the driver braking circuit with high safety further comprises a current protection detection module, and the current protection detection module is used for judging whether the current of the driving end of the motor is normal or not.

7. The driver braking circuit with high safety as set forth in claim 6, wherein: the current protection detection module comprises a detection resistor R12 and a detection resistor R25, the U driving end of the driving controller U1 is connected with the driving end of an external motor through the detection resistor R12, the W driving end of the driving controller U1 is connected with the driving end of the external motor through the detection resistor R25, and one end of the detection resistor R12 and one end of the detection resistor R25 are respectively connected with the signal acquisition end of the driving controller U1.