CN213937780U - Motor buffer controller - Google Patents

Abstract

The utility model particularly discloses a motor buffer controller, a motor buffer controller includes: relay J1, relay J2, and an amplifier circuit; the relay J1 and the relay J2 are used for controlling the forward and reverse rotation of the motor; the amplifying circuit is used for driving the motor through a PWM signal; the positive electrodes of the relay J1 and the relay J2 are connected with a power supply; the relay J1 is connected with the relay J2 in parallel and then is connected with the motor; the amplifying circuit is connected with the relay J1 and the relay J2 in series. Through motor buffer controller can make the motor realize the speed of can controlling again when just reversing.

Description

Motor buffer controller

Technical Field

The utility model relates to an equipment protection technical field, concretely relates to motor buffer controller.

Background

When the motor equipment is used, the starting impact current generated due to overlarge line voltage drop can reach seven-eight times of rated current and even be larger, and multiple times of current impact can cause the motor equipment to be damaged or cause a front-stage circuit breaker to trip, so that soft starting equipment such as a frequency converter and the like is needed. However, when the frequency converter equipment is damaged or the frequency converter cannot be applied, and the power frequency needs to be started or switched to the power frequency from the frequency conversion, if the buffer circuit is not used, the starting current is too large due to too large voltage drop of the line voltage, and adverse results are caused. Therefore, a certain buffer control measure is required to buffer the impact current, so as to avoid the damage of the current impact to the motor equipment.

However, in the prior art, the wiring of the buffer control circuit of the motor is relatively complex, so that a motor buffer control circuit with a simpler circuit and controllable speed is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a motor buffer controller is provided. The motor buffer controller can control the speed of the motor while the motor rotates forwards and backwards.

A motor snubber controller comprising: relay J1, relay J2, and an amplifier circuit;

the relay J1 and the relay J2 are used for controlling the forward and reverse rotation of the motor;

the amplifying circuit is used for driving the motor through a PWM signal;

the positive electrodes of the relay J1 and the relay J2 are connected with a power supply; the relay J1 is connected with the relay J2 in parallel and then is connected with the motor; the amplifying circuit is connected with the relay J1 and the relay J2 in series.

In one embodiment, the positive electrode of the relay J1 is respectively connected with the positive electrode of the relay J2, the positive electrode of the power supply, the normally open contact of the relay J1, the normally open contact of the relay J2 and the positive electrode of the motor; and a normally closed contact of the relay J1 is respectively connected with the negative electrode of the motor, the normally closed contact of the relay J2 and the amplifying circuit.

In one embodiment, the amplification circuit includes:

the circuit comprises a resistor R1, a resistor R2, an optical coupler, a triode Q1 and a MOS tube Q3;

one end of the resistor R1 is connected with a 5V power supply, and the other end of the resistor R1 is connected with the No. 1 interface of the optocoupler; the PWM signal is input to the interface No. 2 of the optical coupler and one end of a resistor R2; the other end of the resistor R2 is connected with the base electrode of the triode Q1; the No. 4 interface of the optical coupler is respectively connected with the collector of a triode Q1 and the grid of an MOS transistor Q3; the emitter of the triode Q1 is grounded; the drain electrode of the MOS tube Q3 is connected with the normally closed contact of the relay J2; the source of the MOS transistor Q3 is grounded.

In one embodiment, the relay J1 and the relay J2 are also connected in series with a brake control module. The motor can be started up and stopped slowly through the brake control module, and the resistance is used as a motor stop brake system.

In one embodiment, the brake control module includes: the resistor R3, the resistor R4, the resistor R5, the resistor R6, the resistor R7, the triode Q2, the MOS tube Q4, the diode D1 and the diode D2;

one end of the resistor R5 is connected with one end of the resistor R4 and is connected with an IO interface of the single chip microcomputer; the other end of the resistor R4 is connected with the base electrode of the triode Q2, and the collector electrode of the triode Q2 is respectively connected with one end of the resistor R6 and one end of the resistor R7; the emitter of the triode Q2 is grounded; the other end of the resistor R6 is connected with the grid of the MOS transistor Q4; the source electrode of the MOS transistor Q4 is respectively connected with the anode of the diode D2, the cathode of the diode D1 and the drain electrode of the MOS transistor Q3; the anode of the diode D1 is connected with the source of the MOS transistor Q3; the drain of the MOS transistor Q4 is connected to the cathode of the diode D2 and one end of the resistor R3, respectively.

In one embodiment, the motor is a dc brushed motor.

Has the advantages that: the technical scheme of the utility model a motor buffer controller is provided, this kind of motor buffer controller has brush motor speed change and positive reverse circuit structure for the control direct current, and this circuit is taken with PWM driving motor by two relays and a field effect transistor, and two relays control motor's positive reverse establish ties PWM mode driving motor for the field effect transistor, can control speed again when making the motor realize positive reverse.

Drawings

Fig. 1 is a schematic circuit diagram of a motor buffer controller.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

In the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, a motor buffer controller includes: relay J1, relay J2, and an amplifier circuit;

the relay J1 and the relay J2 are used for controlling the forward and reverse rotation of the motor;

the amplifying circuit is used for driving the motor through a PWM signal;

the positive electrodes of the relay J1 and the relay J2 are connected with a power supply; the relay J1 is connected with the relay J2 in parallel and then is connected with the motor; the amplifying circuit is connected with the relay J1 and the relay J2 in series.

The positive electrode of the relay J1 is respectively connected with the positive electrode of the relay J2, the positive electrode of a power supply, the normally open contact of the relay J1, the normally open contact of the relay J2 and the positive electrode of the motor; and a normally closed contact of the relay J1 is respectively connected with the negative electrode of the motor, the normally closed contact of the relay J2 and the amplifying circuit.

The amplification circuit includes:

the circuit comprises a resistor R1, a resistor R2, an optical coupler, a triode Q1 and a MOS tube Q3;

one end of the resistor R1 is connected with a 5V power supply, and the other end of the resistor R1 is connected with the No. 1 interface of the optocoupler; the PWM signal is input to the interface No. 2 of the optical coupler and one end of a resistor R2; the other end of the resistor R2 is connected with the base electrode of the triode Q1; the No. 4 interface of the optical coupler is respectively connected with the collector of a triode Q1 and the grid of an MOS transistor Q3; the No. 3 interface of the optical coupler is connected with a power supply V +; the emitter of the triode Q1 is grounded; the drain electrode of the MOS tube Q3 is connected with the normally closed contact of the relay J2; the source of the MOS transistor Q3 is grounded.

The relay J1 and the relay J2 are also connected with a brake control module in series. The motor can be started up and stopped slowly through the brake control module, and the resistance is used as a motor stop brake system.

The brake control module includes: the resistor R3, the resistor R4, the resistor R5, the resistor R6, the resistor R7, the triode Q2, the MOS tube Q4, the diode D1 and the diode D2;

one end of the resistor R5 is connected with one end of the resistor R4 and is connected with an IO interface of the single chip microcomputer; the other end of the resistor R4 is connected with the base electrode of the triode Q2, and the collector electrode of the triode Q2 is respectively connected with one end of the resistor R6 and one end of the resistor R7; the other end of the resistor R7 is connected with a power supply V +; the emitter of the triode Q2 is grounded; the other end of the resistor R6 is connected with the grid of the MOS transistor Q4; the source electrode of the MOS transistor Q4 is respectively connected with the anode of the diode D2, the cathode of the diode D1 and the drain electrode of the MOS transistor Q3; the anode of the diode D1 is connected with the source of the MOS transistor Q3; the drain of the MOS transistor Q4 is connected to the cathode of the diode D2 and one end of the resistor R3, respectively. The other end of the resistor R3 is connected with a fuse F1, and the fuse F1 is also connected with a power supply V +.

The motor is a direct current brush motor.

The working principle is as follows: two relays and a field effect tube are matched to be used with a PWM driving motor, and the forward and reverse rotation series field effect tubes of the two relays control the motor to drive the motor in a PWM mode, so that the motor can realize forward and reverse rotation and can control the speed.

Wherein the positive rotation control: the single chip microcomputer provides PWM signals, after the signals pass through a rear-stage amplifying circuit, the relay J1 is driven, after the positive pole V + of a power supply passes through the positive pole of the relay J1, the signals flow to the positive pole of the motor through a normally open contact of the relay J1, the single chip microcomputer outputs PWM, after the PWM signals pass through the normally open contact of the relay J1, the PWM signals are amplified by the single chip microcomputer, the single chip microcomputer controls the negative pole of the MOS transistor Q3 to control the motor through the optical coupler P521-1 and the triode Q1, current flows through the motor from the normally closed contact of the J2 after flowing to the MOS transistor Q3, the duty ratio of the PWM signals is gradually increased from 0% to 100%, and the motor is slowly started until the motor runs at full speed. When the motor stops, the singlechip outputs PWM, and the PWM duty ratio is gradually reduced from 100% to 0%, so that the motor runs from full speed to stop.

Reverse control: after the level given by the singlechip passes through the post-stage amplifying circuit, the relay J2 is driven, and the positive and negative polarities of the relay J1 and the relay J2 are just opposite to each other to realize the control of the positive and negative rotation of the motor.

The working principle of the motor brake control module is as follows: because the load of the motor is overlarge or the motor cannot stop running on a motor stopping power supply due to inertia, the IO control signal of the single chip microcomputer drives the MOS transistor Q4 after being reversely amplified by the triode, so that the motor is connected in parallel on a resistor R6 to consume electric energy generated when the motor rotates, and the motor braking function is realized.

Of course, the above description only shows a certain embodiment of the present invention, and the detailed description thereof is not to be construed as limiting the scope of the present invention, and it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principle and spirit of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (6)

1. A motor snubber controller, comprising: relay J1, relay J2, and an amplifier circuit;

the relay J1 and the relay J2 are used for controlling the forward and reverse rotation of the motor;

the amplifying circuit is used for driving the motor through a PWM signal;

the positive electrodes of the relay J1 and the relay J2 are connected with a power supply; the relay J1 is connected with the relay J2 in parallel and then is connected with the motor; the amplifying circuit is connected with the relay J1 and the relay J2 in series.

2. The motor buffer controller according to claim 1, wherein the positive pole of the relay J1 is connected with the positive pole of the relay J2, the positive pole of the power supply, the normally open contact of the relay J1, the normally open contact of the relay J2 and the positive pole of the motor respectively; and a normally closed contact of the relay J1 is respectively connected with the negative electrode of the motor, the normally closed contact of the relay J2 and the amplifying circuit.

3. The motor-snubber controller of claim 2, wherein the amplification circuit comprises:

the circuit comprises a resistor R1, a resistor R2, an optical coupler, a triode Q1 and a MOS tube Q3;

one end of the resistor R1 is connected with a 5V power supply, and the other end of the resistor R1 is connected with the No. 1 interface of the optocoupler; the PWM signal is input to the interface No. 2 of the optical coupler and one end of a resistor R2; the other end of the resistor R2 is connected with the base electrode of the triode Q1; the No. 4 interface of the optical coupler is respectively connected with the collector of a triode Q1 and the grid of an MOS transistor Q3; the emitter of the triode Q1 is grounded; the drain electrode of the MOS tube Q3 is connected with the normally closed contact of the relay J2; the source of the MOS transistor Q3 is grounded.

4. The motor buffer controller according to claim 3, wherein the relay J1 relay J2 is further connected in series with a brake control module.

5. The motor-cushioning controller of claim 4, wherein the brake control module comprises: the resistor R3, the resistor R4, the resistor R5, the resistor R6, the resistor R7, the triode Q2, the MOS tube Q4, the diode D1 and the diode D2;

one end of the resistor R5 is connected with one end of the resistor R4 and is connected with an IO interface of the single chip microcomputer; the other end of the resistor R4 is connected with the base electrode of the triode Q2, and the collector electrode of the triode Q2 is respectively connected with one end of the resistor R6 and one end of the resistor R7; the emitter of the triode Q2 is grounded; the other end of the resistor R6 is connected with the grid of the MOS transistor Q4; the source electrode of the MOS transistor Q4 is respectively connected with the anode of the diode D2, the cathode of the diode D1 and the drain electrode of the MOS transistor Q3; the anode of the diode D1 is connected with the source of the MOS transistor Q3; the drain of the MOS transistor Q4 is connected to the cathode of the diode D2 and one end of the resistor R3, respectively.

6. The motor snubber controller of claim 1, wherein the motor is a dc brushed motor.

Images