Electronic speed relay

Abstract

The utility model discloses an electronic speed relay, which is applied to rotating speed measurement of a motor and comprises magnetic steel (2) and a relay unit (3). The relay unit (3) comprises a circuit board (301); a Hall sensor (302), a power supply conversion module (5), a Hall signal processing module (6) and a relay control module (7) are arranged on the circuit board (301); the Hall sensor (302) is connected with the Hall signal processing module (6); the power supply conversion module (5) is respectively connected with the Hall signal processing module (6) and the relay control module (7), and the Hall signal processing module (6) is connected with the relay control module (7); and the relay control module (7) is connected with the motor (1). The rotating speed of the motor is detected by adopting the magnetic steel and the Hall sensor, the detection mode is simple and accurate, the rotation of the motor is conveniently controlled, and the motor has the advantages of convenience in installation and long service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to a speed relay, in particular to an electronic speed relay. BACKGROUND

[0002] Speed relay is a kind of electrical device for measuring and controlling the speed of rotating machinery. It judges the running state of machinery by measuring the rotating speed of mechanical shaft and carries out control operation when necessary. Speed relay is usually composed of sensor, rotating speed measurement circuit, comparison circuit and output circuit, mainly based on the principle of rotating speed measurement and comparison, sensor can measure the rotating speed of mechanical shaft by contact or non-contact mode, and converts rotating speed signal into electrical signal input into rotating speed measurement circuit, rotating speed measurement circuit amplifies, filters and processes input rotating speed signal to obtain stable measurement value, comparison circuit compares measurement value with set value, and when measurement value exceeds or is lower than set value, output signal triggers output circuit to realize corresponding control operation. The existing speed relay on the market is mostly mechanical speed relay, and mechanical speed relay adopts mechanical transmission device to measure rotating speed, but mechanical speed relay has certain problems in use process: 1. From the installation angle, mechanical speed relay is more troublesome to install, and each speed relay needs motor to correct, increasing installation workload;2. From the service life angle, the service life of mechanical speed relay depends on the quality of contact spring, and if contact spring is damaged, user is difficult to maintain, and must return to manufacturer for repair, increasing maintenance cost. SUMMARY

[0003] The utility model discloses a kind of electronic speed relays. The utility model adopts magnet steel and hall sensor to detect the rotating speed of motor, and the detection mode is simple and accurate, and it is convenient to control motor rotation, with the advantages of convenient installation, long service life.

[0004] The technical scheme of the utility model: a kind of electronic speed relays, applied to the rotating speed measurement of motor, including magnet steel and relay unit, the magnet steel is arranged on the driven shaft of motor, and the relay unit is arranged in motor shell and is opposite magnet steel setting;The relay unit includes circuit board fixed in the end of motor shell by copper column, and circuit board is equipped with hall sensor, power conversion module, hall signal processing module and relay control module;The hall sensor is connected with hall signal processing module;The power conversion module is connected with hall signal processing module and relay control module respectively, and the hall signal processing module is connected with relay control module;The relay control module is connected with motor.

[0005] The electronic speed relay, the power conversion module includes transformer B1, chip U1, rectifier U3, capacitor C1, capacitor C2, capacitor C3, terminal J1 and terminal J2;The 1 port of terminal J1 is connected with the 2 port of transformer B1, the 2 port of terminal J1 is connected with the 1 port of transformer B1;The 3 port of transformer B1 is connected with the 3 port of terminal J2 and the 3 port of rectifier U3, the 4 port of transformer B1 is connected with the 1 port of terminal J2 and the 1 port of rectifier U3;The 2 port of rectifier U3 is connected with one end of capacitor C1 and the Vin pin of chip U1, the 4 port of rectifier U3 is connected with the other end of capacitor C1, the GND pin of chip U1, one end of capacitor C2 and one end of capacitor C3;The Vout pin of chip U1 is connected with the other end of capacitor C2 and the other end of capacitor C3, and outputs voltage source VCC.

[0006] The electronic speed relay, the Hall signal processing module includes chip U1A and terminal J4;The CD pin, SD pin and VCC pin of chip U1A are all connected with voltage source VCC;The GND pin of chip U1A is grounded;The Q pin of chip U1A is connected with relay control module;The D pin of chip U1A is connected with the 1 port of terminal J4, and the CLk pin of chip U1A is connected with the 2 port of terminal J4;The 3 port of terminal J4 is grounded, and the 4 port of terminal J4 is connected with voltage source VCC.

[0007] The foregoing electronic speed relay, the relay control module includes chip U2, resistance R1, resistance R2, resistance R3, resistance R4, triode Q1, triode Q2, diode D1, diode D2, relay K1, relay K2, terminal J3, terminal J5 and terminal J6;The VCC pin of the chip U2 is connected with voltage source VCC;The P3.5 pin of the chip U2 is connected with a Hall signal processing module;The GND pin of the chip U2 is grounded;The P3.1 pin of the chip U2 is connected with the 3rd port of terminal J3;The P3.0 pin of the chip U2 is connected with the 4th port of terminal J3;The 2nd port of the terminal J3 is connected with voltage source VCC, and the 1st port of terminal J3 is grounded;The P3.2 pin of the chip U2 is connected with one end of resistance R3 and one end of resistance R4, and the other end of resistance R4 is grounded;The other end of the resistance R3 is connected with the base of triode Q2, and the emitter of triode Q2 is grounded;The collector of triode Q2 is connected with the negative pole of diode D2, and the positive pole of the diode is connected with voltage source VCC;The two ends of diode D2 are connected with the coil of relay K2 in parallel;The switch of relay K2 is connected with terminal J6;The P3.3 pin of the chip U2 is connected with one end of resistance R1 and one end of resistance R2, and the other end of resistance R2 is grounded;The other end of the resistance R1 is connected with the base of triode Q1, and the emitter of triode Q1 is grounded;The collector of triode Q1 is connected with the negative pole of diode D1, and the positive pole of diode D1 is connected with voltage source VCC;The two ends of diode D1 are connected with the coil of relay K1 in parallel;The switch of relay K1 is connected with terminal J5.

[0008] The foregoing electronic speed relay, a motor wiring frame is arranged on the motor;A rotating disc is arranged on the end of the motor driven shaft, and the magnetic steel is fixedly arranged on the rotating disc.

[0009] The foregoing electronic speed relay, the Hall sensor is provided with at least two.

[0010] Compared with the prior art, when the utility model is used, the power conversion module of the relay unit takes power through the input power supply of the motor, and converts the high-voltage power at the two ends of the motor into the working voltage of the relay unit;The rotating state of the motor is collected by the magnetic steel, the Hall signal processing module outputs the rotating state signal of the motor to the relay control module through the Hall sensor, and then the rotating state of the motor is controlled by the relay control module, so that the mechanical speed relay contact spring is omitted, which is not only convenient to install but also improves the service life. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is the structural schematic diagram of the utility model;

[0012] Figure 2 is the circuit diagram of power conversion module;

[0013] Figure 3 is the circuit diagram of hall signal processing module;

[0014] Figure 4 is the circuit diagram of relay control module.

[0015] The mark in the drawing is: 1-motor, 101-motor terminal block, 102-rotating disc, 2-magnetic steel, 3-relay unit, 301-circuit board, 302-hall sensor, 4-copper column, 5-power conversion module, 6-hall signal processing module, 7-relay control module. DETAILED DESCRIPTION

[0016] The utility model will be further explained in connection with the drawings and examples, but not as the basis for the limitation of the utility model.

[0017] Example: electronic speed relay, structure is as Figure 1As shown, including motor 1, the driven shaft end of motor 1 is provided with a circular magnetic steel 2 and relay unit 3, the magnetic steel 2 is arranged on the driven shaft of motor 1, the relay unit 3 is arranged opposite the magnetic steel 2, the magnetic steel 2 and the relay unit 3 are not in contact; the relay unit 3 includes a circuit board 301 fixed on the end of the motor 1 housing through a copper column 4; the magnetic steel 2 is driven by the driven shaft of the motor 1 to rotate, the Hall sensor 302 on the circuit board 301 is stationary relative to the motor 1, the change of the rotation speed of the magnetic steel 2 causes the change of the magnetic field, thereby the Hall sensor 302 is inducted by the change of the magnetic field, so as to realize the measurement of the rotation speed of the driven shaft of the motor 1; the circuit board 301 is provided with the Hall sensor 302, a power conversion module 5, a Hall signal processing module 6 and a relay control module 7; the Hall sensor 302 is connected with the Hall signal processing module 6; the power conversion module 5 is connected with the Hall signal processing module 6 and the relay control module 7 respectively, and the Hall signal processing module 6 is connected with the relay control module 7. The power conversion module 5 is connected with the input power of the motor 1, and the relay unit 3 takes power from the input power of the motor 1. The motor 1 is provided with a motor wiring frame 101, the setting of the motor wiring frame 101 facilitates the connection line of the motor 1; the end of the driven shaft of the motor 1 is provided with a rotating disc 102, the rotating disc 102 is a fixing seat of the magnetic steel 2 arranged on the driven shaft of the motor 1, which facilitates the installation and disassembly of the magnetic steel 2, and the magnetic steel 2 is fixedly arranged on the rotating disc 102. The Hall sensor 302 is provided with at least two, and the two Hall sensors 302 are connected with the chip U1A of the Hall signal processing module 6 through the 1st port and the 2nd port of the wiring terminal J4 respectively. In use, the power conversion module 5 of the relay unit 3 takes power through the input power of the motor 1, and converts the high-voltage electricity at both ends of the motor 1 into the working voltage of the relay unit 3; the Hall sensor 302 collects the rotation state of the motor 1 through the magnetic steel 2, the Hall signal processing module 6 outputs the rotation state signal of the motor 1 to the relay control module 7 through the Hall sensor 302, and then the rotation state of the motor 1 is controlled by the relay control module 7, so that the mechanical speed relay contact spring is omitted, which is not only convenient to install but also prolongs the service life; the present application detects the rotation speed of the motor by using the magnetic steel and the Hall sensor, and controls the rotation of the motor, and has the advantages of convenient installation and long service life.

[0018] The power conversion module 5 is connected with the input power of the motor 1, Figure 2As shown, the power conversion module 5 includes transformer B1, chip U1, rectifier U3, capacitor C1, capacitor C2, capacitor C3, terminal J1 and terminal J2; the 1st port of terminal J1 is connected to the 2nd port of transformer B1, and the 2nd port of terminal J1 is connected to the 1st port of transformer B1; the 3rd port of transformer B1 is connected to the 3rd port of terminal J2 and the 3rd port of rectifier U3, and the 4th port of transformer B1 is connected to the 1st port of terminal J2 and the 1st port of rectifier U3; the 2nd port of rectifier U3 is connected to one end of capacitor C1 and the Vin pin of chip U1, and the 4th port of rectifier U3 is connected to the other end of capacitor C1, the GND pin of chip U1, one end of capacitor C2 and one end of capacitor C3; the Vout pin of chip U1 is connected to the other end of capacitor C2 and the other end of capacitor C3, and outputs voltage source VCC. The power conversion module 5 takes power through the input power of motor 1, converts the high-voltage power at both ends of motor 1 into low-voltage alternating current power through transformer B1, then rectifies through rectifier U3, filters through capacitor C1, and stabilizes through chip U1, to obtain the working voltage required by relay unit 3.

[0019] The Hall signal processing module 6 is as shown in the figure. Figure 3 As shown, the Hall signal processing module 6 includes chip U1A and terminal J4; the CD pin, SD pin and VCC pin of chip U1A are all connected to voltage source VCC; the GND pin of chip U1A is grounded; the Q pin of chip U1A is connected to relay control module 7; the D pin of chip U1A is connected to the 1st port of terminal J4, and the CLk pin of chip U1A is connected to the 2nd port of terminal J4; the 3rd port of terminal J4 is grounded, and the 4th port of terminal J4 is connected to voltage source VCC. When motor 1 is powered on and rotates, Hall sensor 302 collects the rotation state of motor 1 through magnetic steel 2 on rotating disc 102, and Hall signal processing module 6 outputs the rotation state signal of motor 1 to relay control module 7 through Hall sensor 302, and chip U1A can calculate whether the motor is rotating forward or backward, and the rotation state signal is generated by the Q pin of chip U1A and input to the chip U2 of relay control module 7.

[0020] The relay control module 7 is as shown in the figure. Figure 4As shown, the relay control module 7 includes chip U2, resistor R1, resistor R2, resistor R3, resistor R4, triode Q1, triode Q2, diode D1, diode D2, relay K1, relay K2, terminal J3, terminal J5 and terminal J6; the VCC pin of the chip U2 is connected to the voltage source VCC; the P3.5 pin of the chip U2 is connected to the Hall signal processing module 6; the GND pin of the chip U2 is grounded; the P3.1 pin of the chip U2 is connected to the 3rd port of the terminal J3; the P3.0 pin of the chip U2 is connected to the 4th port of the terminal J3; the 2nd port of the terminal J3 is connected to the voltage source VCC, and the 1st port of the terminal J3 is grounded; the P3.2 pin of the chip U2 is connected to one end of the resistor R3 and one end of the resistor R4, and the other end of the resistor R4 is grounded; the other end of the resistor R3 is connected to the base of the triode Q2, and the emitter of the triode Q2 is grounded; the collector of the triode Q2 is connected to the negative electrode of the diode D2, and the positive electrode of the diode is connected to the voltage source VCC; the two ends of the diode D2 are connected in parallel to the coil of the relay K2; the switch of the relay K2 is connected to the terminal J6; the P3.3 pin of the chip U2 is connected to one end of the resistor R1 and one end of the resistor R2, and the other end of the resistor R2 is grounded; the other end of the resistor R1 is connected to the base of the triode Q1, and the emitter of the triode Q1 is grounded; the collector of the triode Q1 is connected to the negative electrode of the diode D1, and the positive electrode of the diode D1 is connected to the voltage source VCC; the two ends of the diode D1 are connected in parallel to the coil of the relay K1; the switch of the relay K1 is connected to the terminal J5. The rotating state signal generated by the chip U1A is input to the chip U2 for processing, when the rotating state signal is at a low level, it is defaulted that the motor 1 rotates forward; otherwise, when the rotating state signal is at a high level, it is defaulted that the motor 1 rotates reversely. When the signal frequency generated by the Hall sensor 302 is greater than 1HZ, it is judged that the motor 1 rotates, otherwise, the motor 1 stops. The chip U2 calculates and processes three output states of the motor 1: stop, forward rotation and reverse rotation. Then, according to the three states, the chip U2 controls the relays K1 and K2, when the motor 1 stops, the chip U2 does not control any relay; when the motor 1 rotates forward, the chip U2 controls the switch of the relay K1 to turn on and off; when the motor 1 rotates reversely, the chip U2 controls the switch of the relay K2 to turn on and off.

[0021] Working principle: the utility model discloses in use, the power conversion module 5 of relay unit 3 is through the input power supply of motor 1 and takes electricity, and the high voltage of both ends of motor 1 is converted into the working voltage of relay unit 3, and the rotating state of motor 1 is collected by the magnetic steel 2 of hall sensor 302, and the rotating state signal of motor 1 is outputted to relay control module 7 by hall sensor 302 through hall signal processing module 6, and then the rotating state of motor 1 is controlled by relay control module 7, and the mechanical speed relay contact spring is saved, not only convenient to install but also improve the service life.

[0022] The above embodiment only expresses the embodiment of the utility model, and the description is more specific and detailed, but it can not be understood as the limitation of the utility model patent scope, and in the embodiment, up, down, left, right, front and back only represent relative position and not absolute position. It should be pointed out that for ordinary skilled person in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. An electronic speed relay for use in measuring the rotational speed of an electric motor, characterized in that: The application relates to a relay unit (3) and a magnetic steel (2) arranged on a driven shaft of a motor (1), the relay unit (3) being arranged on the shell of the motor (1) and facing the magnetic steel (2); the relay unit (3) comprises a circuit board (301) fixed on the end of the shell of the motor (1) through a copper column (4), the circuit board (301) being provided with a Hall sensor (302), a power conversion module (5), a Hall signal processing module (6) and a relay control module (7); the Hall sensor (302) is connected with the Hall signal processing module (6); the power conversion module (5) is connected with the Hall signal processing module (6) and the relay control module (7) respectively, the Hall signal processing module (6) is connected with the relay control module (7); and the relay control module (7) is connected with the motor (1).

2. The electronic speed relay of claim 1, wherein: The power conversion module (5) comprises a transformer B1, a chip U1, a rectifier U3, a capacitor C1, a capacitor C2, a capacitor C3, a terminal J1 and a terminal J2; the No.1 port of the terminal J1 is connected with the No.2 port of the transformer B1, the No.2 port of the terminal J1 is connected with the No.1 port of the transformer B1; the No.3 port of the transformer B1 is connected with the No.3 port of the terminal J2 and the No.3 port of the rectifier U3, the No.4 port of the transformer B1 is connected with the No.1 port of the terminal J2 and the No.1 port of the rectifier U3; the No.2 port of the rectifier U3 is connected with one end of the capacitor C1 and the Vin pin of the chip U1, the No.4 port of the rectifier U3 is connected with the other end of the capacitor C1, the GND pin of the chip U1, one end of the capacitor C2 and one end of the capacitor C3; the Vout pin of the chip U1 is connected with the other end of the capacitor C2 and the other end of the capacitor C3, and outputs a voltage source VCC.

3. The electronic speed relay of claim 1, wherein: The Hall signal processing module (6) comprises a chip U1A and a terminal J4; the CD pin, the SD pin and the VCC pin of the chip U1A are all connected with the voltage source VCC; the GND pin of the chip U1A is grounded; the Q pin of the chip U1A is connected with the relay control module (7); the D pin of the chip U1A is connected with the No.1 port of the terminal J4, and the CLk pin of the chip U1A is connected with the No.2 port of the terminal J4; the No.3 port of the terminal J4 is grounded, and the No.4 port of the terminal J4 is connected with the voltage source VCC.

4. The electronic speed relay of claim 1, wherein: The relay control module (7) comprises a chip U2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a triode Q1, a triode Q2, a diode D1, a diode D2, a relay K1, a relay K2, a terminal J3, a terminal J5 and a terminal J6; the VCC pin of the chip U2 is connected with a voltage source VCC; the P3.5 pin of the chip U2 is connected with the Hall signal processing module (6); the GND pin of the chip U2 is grounded; the P3.1 pin of the chip U2 is connected with the No. 3 port of the terminal J3; the P3.0 pin of the chip U2 is connected with the No. 4 port of the terminal J3; the No. 2 port of the terminal J3 is connected with the voltage source VCC, and the No. 1 port of the terminal J3 is grounded; the P3.2 pin of the chip U2 is connected with one end of the resistor R3 and one end of the resistor R4, and the other end of the resistor R4 is grounded; the other end of the resistor R3 is connected with the base of the triode Q2, and the emitter of the triode Q2 is grounded; the collector of the triode Q2 is connected with the negative pole of the diode D2, and the positive pole of the diode is connected with the voltage source VCC; the two ends of the diode D2 are connected in parallel with the coil of the relay K2; the switch of the relay K2 is connected with the terminal J6; the P3.3 pin of the chip U2 is connected with one end of the resistor R1 and one end of the resistor R2, and the other end of the resistor R2 is grounded; the other end of the resistor R1 is connected with the base of the triode Q1, and the emitter of the triode Q1 is grounded; the collector of the triode Q1 is connected with the negative pole of the diode D1, and the positive pole of the diode D1 is connected with the voltage source VCC; the two ends of the diode D1 are connected in parallel with the coil of the relay K1; the switch of the relay K1 is connected with the terminal J5.

5. The electronic speed relay of claim 1, wherein: The motor (1) is provided with a motor wiring frame (101); the end of the driven shaft of the motor (1) is provided with a rotating disc (102), and the magnetic steel (2) is fixedly arranged on the rotating disc (102).

6. The electronic speed relay of claim 1, wherein: The Hall sensor (302) is provided with at least two.

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