CN213402856U - Intelligent voltage reduction starting controller - Google Patents
Intelligent voltage reduction starting controller Download PDFInfo
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- CN213402856U CN213402856U CN202021746310.5U CN202021746310U CN213402856U CN 213402856 U CN213402856 U CN 213402856U CN 202021746310 U CN202021746310 U CN 202021746310U CN 213402856 U CN213402856 U CN 213402856U
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Abstract
The utility model discloses an intelligent voltage reduction starting controller, wherein a circuit board comprises a control panel, a voltage conversion circuit, a stator winding, a relay group, a current detection circuit, a wiring board and a circuit board; the control panel is electrically connected with the voltage conversion circuit, and the voltage conversion circuit is used for reducing the large voltage generated by the input current to the voltage required by the starting of the motor; the voltage conversion circuit is connected with the stator winding through a connecting wire, the stator winding is electrically connected with the relay group, the relay group is electrically connected with the input end of the current detection circuit, the current detection circuit is used for detecting the current conducted by the relay, and the output end of the current detection circuit is connected with the wiring board through the connecting wire.
Description
Technical Field
The utility model belongs to the motor control field, concretely relates to intelligence step-down start control ware.
Background
With the development of the industrial electromechanical industry in China, the three-phase asynchronous motor is also developed, and is widely applied to light and heavy-load equipment such as fans, water pumps, conveying equipment, compressors and the like.
The problems of the prior art are as follows: (1) when the controller is started, the relay is switched on, and no current passes through a relay channel, so that the working efficiency of the motor controller is reduced, a large amount of electric energy is consumed, and the normal work of the motor is influenced. (2) When the controller stops working, the relay is switched off, current passes through the relay, and the controller is in a working state, so that the voltage of the controller is reduced excessively, the starting voltage does not reach the normal working voltage of the motor, and the normal operation of the motor is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model is used for a intelligence step-down start control ware for solve prior art, whether the problem of electric current exists in the inside relay of machine controller when the motor stops starting, make machine controller can be fast, control the motor reliably and start, improve machine controller's work efficiency.
In order to solve the technical problem, the utility model discloses a following technical scheme:
an intelligent voltage reduction starting controller comprises a circuit board, a control panel, a voltage conversion circuit, a stator winding, a relay group, a current detection circuit and a wiring board, wherein the control panel is connected with the voltage conversion circuit; the control panel is electrically connected with the voltage conversion circuit, and the voltage conversion circuit is used for reducing the large voltage generated by the input current to the voltage required by the starting of the motor; the voltage conversion circuit is connected with the stator winding through a connecting wire, the stator winding is electrically connected with the relay group, the relay group is electrically connected with the input end of the current detection circuit, the current detection circuit is used for detecting the current conducted by the relay, and the output end of the current detection circuit is connected with the wiring board through the connecting wire.
Preferably, the relay group comprises a first relay, a second relay and a third relay, and the stator winding comprises a first stator winding, a second stator winding and a third stator winding; the first stator, the second stator and the third stator are respectively connected with a relay through connecting wires.
Preferably, the current detection circuit is provided with three paths of sub-current detection circuits, wherein the first path of sub-current detection circuit is used for detecting the current of the first relay, the second path of sub-current detection circuit is used for detecting the current of the second relay, and the third path of sub-current detection circuit is used for detecting the current of the third relay.
Preferably, the first sub-current detection circuit comprises a first hall sensor a, a first resistor R1, a first rectifier bridge D1, a first capacitor C1, a first follower U1, a first control unit U2, a first photocoupler U3, a first power circuit, and a first main control unit U4; the pin No. 1 of the first Hall sensor A is used for detecting a first current I1, the pin No. 3 of the first Hall sensor A is connected with one end of a first resistor R1 and the pin No. 1 of a first rectifier bridge D1, the pin No. 4 of the first Hall sensor A is connected with the other end of the first resistor R1 and the pin No. 2 of the first rectifier bridge D1 to be grounded together, the pin No. 3 of the first rectifier bridge D1 is connected with one end of a first capacitor C1 and the positive pole of the pin No. 5 of a first follower U1, the pin No. 4 of the first rectifier bridge D1 is connected with the other end of a first capacitor C1, the negative pole of the pin No. 6 of the first follower U1 is connected with the pin No. 7 of a first follower U1 and one end of a first control unit U2, the other end of the first control unit U2 is connected with one end of the first photoelectric coupler U3, the other end of the first photoelectric coupler U4 is connected with a main control unit U4 of the first Hall sensor A, the voltage of +/-15V is provided for the first Hall sensor A, and the voltage of 220V is connected to the other end of the first power supply circuit.
Preferably, the second sub-circuit current detection circuit comprises a second hall sensor B, a second resistor R2, a second rectifier bridge D2, a second capacitor C2, a second follower U5, a second control unit U6, a second photocoupler U7, and a second power supply circuit B; pin 1 of the second hall sensor B is used for detecting current I2, pin 3 of the second hall sensor B is connected with one end of a second resistor R2 and pin 1 of a second rectifier bridge D2, pin 4 of the second hall sensor B is connected with the other end of a second resistor R2 and pin 2 of a second rectifier bridge D2 together with ground, pin 3 of the second rectifier bridge D2 is connected with one end of a second capacitor C2 and the positive pole of pin 5 of a second follower U5, pin 4 of the second rectifier bridge D2 is connected with the other end of a second capacitor C2, the negative pole of pin 6 of the second follower U5 is connected with pin 7 of a second follower U5 and one end of a second control unit U6, the other end of the second control unit U6 is connected with one end of a second photocoupler U7, the other end of the second photocoupler U7 is connected with a main control unit U4, and one end of the second hall sensor B is connected with a second power supply circuit B4, the voltage of +/-15V is provided for the second Hall sensor B, and the other end of the second power supply circuit is connected with the voltage of 220V.
Preferably, the third sub-current detection circuit comprises a third hall sensor C, a third resistor R3, a third rectifier bridge D3, a third capacitor C3, a third follower U8, a third control unit U9, a third photocoupler U10, and a third power supply circuit; pin 1 of the third hall sensor is used for detecting current I3, pin 3 of the third hall sensor C is connected with one end of a third resistor R3 and pin 1 of a third rectifier bridge D3, pin 4 of the third hall sensor C is connected with the other end of the third resistor R3 and pin 2 of the third rectifier bridge D3 together with ground, pin 3 of the third rectifier bridge D3 is connected with one end of a third capacitor C3 and the positive pole of pin 5 of a third follower U8, pin 4 of the third rectifier bridge D3 is connected with the other end of a third capacitor C3, the negative pole of pin 6 of the third follower U8 is connected with pin 7 of the third follower U8 and one end of a third control unit U9, the other end of the third control unit U9 is connected with one end of a third photocoupler U10, the other end of the third photocoupler U10 is connected with one end of a main control unit U4 of the third power supply unit, and one end of the third hall sensor is connected with a third hall sensor circuit, the voltage of +/-15V is provided for the third Hall sensor C, and the other end of the third power supply circuit is connected with the voltage of 220V.
Adopt the utility model discloses following beneficial effect has: the current change that can accurately detect the relay and switch on judges whether there is the electric current in the relay passageway when motor controller starts to this index as judging relay stability to protect motor controller's working circuit, improve motor controller's efficiency and security, prolong motor controller's life.
Drawings
Fig. 1 is an overall schematic view of an intelligent step-down start controller according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a current detection circuit in the intelligent step-down start controller according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, an intelligent step-down starting controller according to an embodiment of the present invention is shown, a circuit board 7 of the controller includes a control board 1, a voltage conversion circuit 2, a stator winding 3, a relay group 4, a current detection circuit 5, and a wiring board 6, the control board 1 is electrically connected to the voltage conversion circuit 2, and the voltage conversion circuit 2 is configured to reduce a large voltage generated by an input current to a voltage required for starting a motor; the voltage conversion circuit 2 is connected with the stator winding 3 through a connecting wire, the stator winding 3 is electrically connected with the relay group 4, the relay group 4 is electrically connected with the input end of the current detection circuit 5, the current detection circuit 5 is used for detecting the current conducted by the relay, and the output end of the current detection circuit 5 is connected with the wiring board 6 through a connecting wire.
Further, the relay group includes a first relay 41, a second relay 42, and a third relay 43, and the stator winding includes a first stator winding 31, a second stator winding 32, and a third stator winding 33; the first stator 31, the second stator 32, and the third stator 33 are connected to a relay via connection lines.
Furthermore, the current detection circuit is provided with three paths of sub-current detection circuits, wherein the first path of sub-current detection circuit is used for detecting the current of the first relay, the second path of sub-current detection circuit is used for detecting the current of the second relay, and the third path of sub-current detection circuit is used for detecting the current of the third relay.
Referring to fig. 2, the first path current detection circuit includes a first hall sensor a, a first resistor R1, a first rectifier bridge D1, a first capacitor C1, a first follower U1, a first control unit U2, a first photocoupler U3, a first power circuit, and a first main control unit U4; the pin No. 1 of the first Hall sensor A is used for detecting a first current I1, the pin No. 3 of the first Hall sensor A is connected with one end of a first resistor R1 and the pin No. 1 of a first rectifier bridge D1, the pin No. 4 of the first Hall sensor A is connected with the other end of the first resistor R1 and the pin No. 2 of the first rectifier bridge D1 to be grounded together, the pin No. 3 of the first rectifier bridge D1 is connected with one end of a first capacitor C1 and the positive pole of the pin No. 5 of a first follower U1, the pin No. 4 of the first rectifier bridge D1 is connected with the other end of a first capacitor C1, the negative pole of the pin No. 6 of the first follower U1 is connected with the pin No. 7 of a first follower U1 and one end of a first control unit U2, the other end of the first control unit U2 is connected with one end of the first photoelectric coupler U3, the other end of the first photoelectric coupler U4 is connected with a main control unit U4 of the first Hall sensor A, the voltage of +/-15V is provided for the first Hall sensor A, and the voltage of 220V is connected to the other end of the first power supply circuit.
The second sub-circuit current detection circuit comprises a second Hall sensor B, a second resistor R2, a second rectifier bridge D2, a second capacitor C2, a second follower U5, a second control unit U6, a second photoelectric coupler U7 and a second power supply circuit; pin 1 of the second hall sensor B is used for detecting current I2, pin 3 of the second hall sensor B is connected with one end of a second resistor R2 and pin 1 of a second rectifier bridge D2, pin 4 of the second hall sensor B is connected with the other end of a second resistor R2 and pin 2 of a second rectifier bridge D2 together with ground, pin 3 of the second rectifier bridge D2 is connected with one end of a second capacitor C2 and the positive pole of pin 5 of a second follower U5, pin 4 of the second rectifier bridge D2 is connected with the other end of a second capacitor C2, the negative pole of pin 6 of the second follower U5 is connected with pin 7 of a second follower U5 and one end of a second control unit U6, the other end of the second control unit U6 is connected with one end of a second photocoupler U7, the other end of the second photocoupler U7 is connected with a main control unit U4, and one end of the second hall sensor B is connected with a second power supply circuit B4, the voltage of +/-15V is provided for the second Hall sensor B, and the other end of the second power supply circuit is connected with the voltage of 220V.
The third sub-current detection circuit comprises a third Hall sensor C, a third resistor R3, a third rectifier bridge D3, a third capacitor C3, a third follower U8, a third control unit U9, a third photoelectric coupler U10 and a third power supply circuit; pin 1 of the third hall sensor is used for detecting current I3, pin 3 of the third hall sensor C is connected with one end of a third resistor R3 and pin 1 of a third rectifier bridge D3, pin 4 of the third hall sensor C is connected with the other end of the third resistor R3 and pin 2 of the third rectifier bridge D3 together with ground, pin 3 of the third rectifier bridge D3 is connected with one end of a third capacitor C3 and the positive pole of pin 5 of a third follower U8, pin 4 of the third rectifier bridge D3 is connected with the other end of a third capacitor C3, the negative pole of pin 6 of the third follower U8 is connected with pin 7 of the third follower U8 and one end of a third control unit U9, the other end of the third control unit U9 is connected with one end of a third photocoupler U10, the other end of the third photocoupler U10 is connected with one end of a main control unit U4 of the third power supply unit, and one end of the third hall sensor is connected with a third hall sensor circuit, the voltage of +/-15V is provided for the third Hall sensor C, and the other end of the third power supply circuit is connected with the voltage of 220V.
The current detection process is as follows, because the current flowing through the relay is weak, the change of the current is difficult to detect by the common current detection circuit, in the sampling circuit shown in fig. 2, V1, V2 and V3 are respectively the detection points of the first relay, the second relay and the third relay, because the current collected by the hall sensor is converted into voltage according to a certain proportion, the voltage conversion proportion of the hall sensor is 1: 100, when the motor controller is closed, if the relay has a current of 10mA, the voltage of 0.01V can be detected through the voltage detection of the detection point, at the moment, the relay is not completely disconnected, and is in a pull-in state at all, when the Hall element detects the current, the Hall sensor amplifies the detected current through the follower, the detected current is sent to the control unit through serial port communication, and the control unit feeds back the detected current to the control panel according to the received data information, so that the circuit of the controller is protected.
The calculation formula for converting current into voltage in the hall sensor can be expressed as:
Va＝kaIa
wherein k is represented by a conversion ratio which is 1: 100, I is represented by the sampled current, a (1, 2, 3) is represented by the a-th relay, and the sampled voltage increases with increasing current. For example, sample the first
When the current of each relay is 0.02A, the voltage value obtained by conversion is as follows:
the controller working process is as follows, because the stability of relay is difficult to the accuse in the machine controller, adopt the current detection circuit to detect whether there is the electric current in the relay passageway, the motor starts the back, if detection circuit does not detect the relay and has the electric current to pass through, perhaps detection circuit detects in the relay after the motor shuts off and has the electric current to pass through, the control unit among the detection circuit will detect data and pass through serial ports and send to the control panel, control panel control motor stops, in time inspect or change the relay, reduce the economic loss that circuit fault caused, the working circuit of protection controller.
It is to be understood that the exemplary embodiments described herein are illustrative and not restrictive. While one or more embodiments of the present invention have been illustrated in the accompanying drawings, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. An intelligent voltage reduction starting controller is characterized in that a circuit board of the controller comprises a control board, a voltage conversion circuit, a stator winding, a relay group, a current detection circuit and a wiring board; the control panel is electrically connected with the voltage conversion circuit, and the voltage conversion circuit is used for reducing the large voltage generated by the input current to the voltage required by the starting of the motor; the voltage conversion circuit is connected with the stator winding through a connecting wire, the stator winding is electrically connected with the relay group, the relay group is electrically connected with the input end of the current detection circuit, the current detection circuit is used for detecting the current conducted by the relay, and the output end of the current detection circuit is connected with the wiring board through the connecting wire.
2. The intelligent buck start controller according to claim 1, wherein the relay bank includes a first relay, a second relay, and a third relay, the stator windings include a first stator winding, a second stator winding, and a third stator winding; the first stator, the second stator and the third stator are respectively connected with a relay through connecting wires.
3. The intelligent buck start controller according to claim 1 or 2, wherein the current detection circuit is provided with three sub-current detection circuits, wherein a first sub-current detection circuit is used for detecting the current of the first relay, a second sub-current detection circuit is used for detecting the current of the second relay, and a third sub-current detection circuit is used for detecting the current of the third relay.
4. The intelligent buck start controller as claimed in claim 3, wherein the first path current detection circuit includes a first hall sensor a, a first resistor R1, a first rectifier bridge D1, a first capacitor C1, a first follower U1, a first control unit U2, a first photocoupler U3, a first power supply circuit, a first main control unit U4; the pin No. 1 of the first Hall sensor A is used for detecting a first current I1, the pin No. 3 of the first Hall sensor A is connected with one end of a first resistor R1 and the pin No. 1 of a first rectifier bridge D1, the pin No. 4 of the first Hall sensor A is connected with the other end of the first resistor R1 and the pin No. 2 of the first rectifier bridge D1 to be grounded together, the pin No. 3 of the first rectifier bridge D1 is connected with one end of a first capacitor C1 and the positive pole of the pin No. 5 of a first follower U1, the pin No. 4 of the first rectifier bridge D1 is connected with the other end of a first capacitor C1, the negative pole of the pin No. 6 of the first follower U1 is connected with the pin No. 7 of a first follower U1 and one end of a first control unit U2, the other end of the first control unit U2 is connected with one end of the first photoelectric coupler U3, the other end of the first photoelectric coupler U4 is connected with a main control unit U4 of the first Hall sensor A, the voltage of +/-15V is provided for the first Hall sensor A, and the voltage of 220V is connected to the other end of the first power supply circuit.
5. The intelligent buck start controller as claimed in claim 3, wherein the second sub-circuit current detection circuit comprises a second hall sensor B, a second resistor R2, a second rectifier bridge D2, a second capacitor C2, a second follower U5, a second control unit U6, a second photocoupler U7, a second power supply circuit; pin 1 of the second hall sensor B is used for detecting current I2, pin 3 of the second hall sensor B is connected with one end of a second resistor R2 and pin 1 of a second rectifier bridge D2, pin 4 of the second hall sensor B is connected with the other end of a second resistor R2 and pin 2 of a second rectifier bridge D2 together with ground, pin 3 of the second rectifier bridge D2 is connected with one end of a second capacitor C2 and the positive pole of pin 5 of a second follower U5, pin 4 of the second rectifier bridge D2 is connected with the other end of a second capacitor C2, the negative pole of pin 6 of the second follower U5 is connected with pin 7 of a second follower U5 and one end of a second control unit U6, the other end of the second control unit U6 is connected with one end of a second photocoupler U7, the other end of the second photocoupler U7 is connected with one end of a second main control unit U4, and one end of a second hall sensor B is connected with a power supply circuit, the voltage of +/-15V is provided for the second Hall sensor B, and the other end of the second power supply circuit is connected with the voltage of 220V.
6. The intelligent buck start controller according to claim 3, wherein the third sub-current detection circuit includes a third hall sensor C, a third resistor R3, a third rectifier bridge D3, a third capacitor C3, a third follower U8, a third control unit U9, a third photocoupler U10, a third power supply circuit; pin 1 of the third hall sensor is used for detecting current I3, pin 3 of the third hall sensor C is connected with one end of a third resistor R3 and pin 1 of a third rectifier bridge D3, pin 4 of the third hall sensor C is connected with the other end of the third resistor R3 and pin 2 of the third rectifier bridge D3 together with ground, pin 3 of the third rectifier bridge D3 is connected with one end of a third capacitor C3 and the positive pole of pin 5 of a third follower U8, pin 4 of the third rectifier bridge D3 is connected with the other end of a third capacitor C3, the negative pole of pin 6 of the third follower U8 is connected with pin 7 of the third follower U8 and one end of a third control unit U9, the other end of the third control unit U9 is connected with one end of a third photocoupler U10, the other end of the third photocoupler U10 is connected with one end of a main control unit U4 of the third power supply unit, and one end of the third hall sensor is connected with a third hall sensor circuit, the voltage of +/-15V is provided for the third Hall sensor C, and the other end of the third power supply circuit is connected with the voltage of 220V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021746310.5U CN213402856U (en) | 2020-08-20 | 2020-08-20 | Intelligent voltage reduction starting controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021746310.5U CN213402856U (en) | 2020-08-20 | 2020-08-20 | Intelligent voltage reduction starting controller |
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| Publication Number | Publication Date |
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| CN213402856U true CN213402856U (en) | 2021-06-08 |
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| CN202021746310.5U Active CN213402856U (en) | 2020-08-20 | 2020-08-20 | Intelligent voltage reduction starting controller |
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| CN (1) | CN213402856U (en) |
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