CN211481181U - Direct current motor rotating speed regulating circuit - Google Patents
Direct current motor rotating speed regulating circuit Download PDFInfo
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- CN211481181U CN211481181U CN201922499982.4U CN201922499982U CN211481181U CN 211481181 U CN211481181 U CN 211481181U CN 201922499982 U CN201922499982 U CN 201922499982U CN 211481181 U CN211481181 U CN 211481181U
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Abstract
The utility model discloses a direct current motor speed regulating circuit, including first filter circuit, rectifier circuit, second filter circuit, voltage stabilizing circuit, third filter circuit, silicon controlled rectifier circuit, feedback circuit, zero passage circuit and control chip, alternating current power supply loops through first filter circuit, rectifier circuit, second filter circuit, voltage stabilizing circuit, third filter circuit and silicon controlled rectifier circuit are connected with direct current motor. Adopt the utility model discloses, high low frequency noise in the filtering electric wire netting, prevent the circuit malfunction and utilize hall device to detect motor speed, satisfy no matter motor load is light and heavy, all can make motor speed reach the unanimous effect.
Description
Technical Field
The utility model relates to a motor speed governing field especially relates to a direct current motor speed regulation circuit.
Background
When the inching control household appliance with the motor is used, the rotating speed is inconsistent due to excessive noise in a power grid and light and heavy load of the motor. When the noise in the power grid is too large, the circuit interference is increased, the circuit detection signal is influenced, and the EMC test is not satisfied; and when the load of the motor is lighter, the working speed of the motor can be faster, so that the motor can reach the effect of high rotating speed, but the risk of tipping the food in the container exists. However, when the motor is loaded heavily, the same circuit board conditions can slow down the rotation speed of the motor or cause the motor to be jammed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a direct current motor speed regulating circuit is provided, above-mentioned technical problem can be solved.
In order to solve the technical problem, the utility model provides a direct current motor speed regulating circuit, including first filter circuit, rectifier circuit, second filter circuit, voltage stabilizing circuit, third filter circuit, silicon controlled rectifier circuit, feedback circuit, zero cross circuit and control chip, alternating current power supply loops through first filter circuit, rectifier circuit, second filter circuit, voltage stabilizing circuit, third filter circuit and silicon controlled rectifier circuit are connected with direct current motor; the feedback circuit is a Hall sensor circuit, and the Hall sensor circuit is used for converting the rotating speed of the direct current motor into a pulse signal and outputting the pulse signal to the control chip; the controllable silicon circuit comprises a controllable silicon, a first current-limiting resistor and a first pull-up resistor, wherein the anode of the controllable silicon is connected with the output end of the voltage stabilizing circuit, the cathode of the controllable silicon is connected with the direct current motor, the control electrode of the controllable silicon is connected with the control chip through the first current-limiting resistor, and the anode of the controllable silicon is connected with the control electrode through the first pull-up resistor. The zero-crossing circuit comprises a second current-limiting resistor, one end of the second current-limiting resistor is connected with the output end of the first filter circuit, and the other end of the second current-limiting resistor is connected with the control chip.
Preferably, the first filter circuit includes a second capacitor, a third capacitor, a common mode inductor, a fourth capacitor and a fifth capacitor, and the second capacitor, the third capacitor, the common mode inductor, the fourth capacitor and the fifth capacitor form a pi-type filter circuit.
Preferably, the second filter circuit is a sixth capacitor.
Preferably, the third filter circuit comprises an eighth capacitor and a ninth capacitor, and the eighth capacitor and the ninth capacitor are connected in parallel.
Preferably, the voltage stabilizing circuit comprises a first voltage regulator tube, a second voltage regulator tube and a third current limiting resistor, wherein the first voltage regulator tube and the second voltage regulator tube are connected in parallel and then connected in series with the third current limiting resistor.
Preferably, the dc motor speed regulating circuit further comprises a protection circuit, the protection circuit comprises a protective tube and a piezoresistor, and the ac power supply is connected to the first filter circuit sequentially through the protective tube and the piezoresistor.
Preferably, the dc motor speed adjusting circuit further includes a current limiting circuit, the current limiting circuit includes a first capacitor, a fourth current limiting resistor, and a fifth current limiting resistor, the first capacitor is connected in parallel with the fourth current limiting resistor and then connected in series with the fifth current limiting resistor, the first capacitor is connected to the output terminal of the first filter circuit, and the fifth current limiting resistor is connected to the input terminal of the rectifier circuit.
Preferably, the dc motor speed adjusting circuit further includes a first discharging circuit, the discharging circuit is connected in parallel with the first filter circuit, the first discharging circuit includes a first discharging resistor and a second discharging resistor, and the first discharging resistor and the second discharging resistor are connected in series.
Preferably, the dc motor speed adjusting circuit further includes a second discharging circuit, the second discharging circuit includes a third discharging resistor, and the third discharging resistor is connected in parallel with the third filter circuit.
Preferably, the hall sensor circuit includes a hall sensor, a second pull-up resistor and a sixth current-limiting resistor, a power supply end of the hall sensor is connected to a working power supply, an output end of the hall sensor is connected to the control chip through the sixth current-limiting resistor, and the output end of the hall sensor is further connected to the working power supply through the second pull-up resistor.
Implement the utility model has the advantages that:
the utility model provides a direct current motor speed regulating circuit through increasing first pull-up resistance and feedback circuit and pi type filter circuit, can high low frequency noise in the filtering electric wire netting, prevent the circuit malfunction and utilize hall device to detect motor speed situation, satisfies no matter motor load is light and heavy, all can make motor speed reach unanimous effect.
Drawings
Fig. 1 is a circuit block diagram of a dc motor speed adjusting circuit provided by the present invention;
fig. 2 is a circuit diagram of a thyristor according to the present invention;
fig. 3 is a power supply circuit diagram of the dc motor speed adjusting circuit according to the present invention;
fig. 4 is a circuit diagram of the peripheral circuit of the control chip provided by the present invention;
fig. 5 is a circuit diagram of a hall sensor provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings. It is only noted that the invention is intended to be limited to the specific forms set forth herein, including any reference to the drawings, as well as any other specific forms of embodiments of the invention.
As shown in fig. 1, the utility model provides a dc motor speed regulating circuit, including first filter circuit 1, rectifier circuit 2, second filter circuit 3, voltage stabilizing circuit 4, third filter circuit 5, silicon controlled rectifier circuit 6, feedback circuit 8, zero cross circuit 9 and control chip 7, ac power supply 10 loops through first filter circuit 1, rectifier circuit 2, second filter circuit 3, voltage stabilizing circuit 4, third filter circuit 5 and silicon controlled rectifier circuit 6 are connected with dc motor 11; the feedback circuit 8 is a hall sensor circuit, and the hall sensor circuit is used for converting the rotating speed of the direct current motor 11 into a pulse signal and outputting the pulse signal to the control chip 7.
As shown in fig. 2, the thyristor circuit 6 includes a thyristor BT1, a first current limiting resistor R16 and a first pull-up resistor R15, an anode T1 of the thyristor BT1 is connected to an output terminal (+5V) of the voltage regulator circuit, a cathode T2 of the thyristor BT1 is connected to the dc motor (motor-OUT terminal), a control electrode G of the thyristor BT1 is connected to the control chip U1 through the first current limiting resistor R16, and an anode T1 and a control electrode G of the thyristor BT1 are connected through the first pull-up resistor R15.
As shown in fig. 3, the control chip U1 is SC92F7250, the control chip U1 is provided with eight pins (1 ~ 8), wherein pin 1 is grounded, pin 3 is connected with hall sensor (hall), pin 6 is connected with zero cross circuit (zero), pin 7 is connected with silicon controlled rectifier (MOTOR), pin 4 is grounded sequentially through first inching switch K1 (low-gear speed switch) and resistor R9, and pin 5 is grounded sequentially through second inching switch K2 (high-gear speed switch) and resistor R10. It should be noted that the control chip for use in the present invention is not limited to SC92F7250, and the control element capable of implementing the above function is all suitable for the present invention.
As shown in fig. 4, the zero-cross circuit 9 includes a second current-limiting resistor (R6 and R8) having one end connected to the output terminal of the first filter circuit and the other end connected to the control chip (zero).
The utility model discloses, through the high low frequency noise in the 1 filtering electric wire netting of first filter circuit, convert the alternating current into stable direct current and carry out corresponding filtering through rectifier circuit 2, second filter circuit 3, voltage stabilizing circuit 4 and third filter circuit 5, carry out the speed governing to direct current motor through silicon controlled circuit 6, hall sensor circuit be used for with direct current motor 11's rotational speed turns into pulse signal, and will pulse signal exports extremely control chip 7, control chip can adjust the motor rotational speed with hall sensor circuit and zero passage circuit pulse signal's duty cycle to realize adjusting motor rotational speed, satisfy no matter motor load is light and heavy, all can make the effect that the motor rotational speed reaches the unanimity. Meanwhile, the control electrode of the silicon controlled rectifier is connected with the direct current power supply through the first pull-up resistor, so that the situation that when no signal exists at the MOTOR port of the control chip, the G electrode of the silicon controlled rectifier BT1 is in a suspended state, and false operation can be caused when the use environment of the machine is interfered can be avoided.
Preferably, the first filter circuit 1 includes a second capacitor XC1, a third capacitor XC2, a common mode inductor L1, a fourth capacitor CY1, and a fifth capacitor CY2, and the second capacitor XC1, the third capacitor XC2, the common mode inductor L1, the fourth capacitor CY1, and the fifth capacitor CY2 form a pi-type filter circuit. The pi-type filter circuit can filter out power grid interference.
More preferably, the second filter circuit 3 is a sixth capacitor EC 2. The sixth capacitor EC2 is an electrolytic capacitor and filters the signal after the signal is rectified.
Further, the third filter circuit 5 includes an eighth capacitor EC1 and a ninth capacitor C1, and the eighth capacitor EC1 and the ninth capacitor EC1 are connected in parallel and used for filtering the voltage-stabilized signal and eliminating interference.
Preferably, the voltage stabilizing circuit 4 comprises a first voltage regulator ZD1(5.1V/1W), a second voltage regulator ZD2(5.1V/1W) and a third current limiting resistor R3, and the first voltage regulator ZD1 and the second voltage regulator ZD2 are connected in parallel and then connected in series with the third current limiting resistor R3. The voltage stabilizing circuit can provide stable working voltage for the motor and provide stable working power supply for other components.
Preferably, the direct current motor speed regulating circuit further comprises a protection circuit, the protection circuit comprises a protective tube (F1 and F2) and a piezoresistor RV1, and an alternating current power supply is connected with the first filter circuit sequentially through the protective tube, the piezoresistor and the first filter circuit. The protective tube is used for preventing the circuit current from being overlarge to burn out components, and the piezoresistor is used for absorbing instant surge and protecting a circuit behind.
Preferably, the dc motor rotation speed adjusting circuit further includes a current limiting circuit, the current limiting circuit includes a first capacitor XC3, a fourth current limiting resistor R7 and a fifth current limiting resistor R5, the first capacitor XC3 is connected in parallel with the fourth current limiting resistor R7 and then is connected in series with the fifth current limiting resistor R5, the first capacitor XC3 is connected to an output end of the first filter circuit, and the fifth current limiting resistor R5 is connected to an input end of the rectifier circuit. The current limiting circuit has the functions of current limiting and surge resistance.
Further, the direct current motor speed regulating circuit further comprises a first discharging circuit, the discharging circuit is connected with the first filter circuit in parallel, the first discharging circuit comprises a first discharging resistor R2 and a second discharging resistor R4, and the first discharging resistor R2 and the second discharging resistor R4 are connected in series and used for discharging charges stored in a capacitor in the first filter circuit. The direct current motor rotating speed adjusting circuit further comprises a second discharging circuit, the second discharging circuit comprises a third discharging resistor R1, and the third discharging resistor R1 is connected with the third filter circuit in parallel and used for discharging charges stored in a capacitor in the third filter circuit.
Preferably, the rectifying circuit is a half-bridge rectifying bridge, and includes a first rectifying diode D1 and a second rectifying diode D2, and rectifies the filtered ac signal through the half-bridge rectifying bridge.
As shown in fig. 5, the hall sensor circuit includes a hall sensor, a second pull-up resistor R12, and a sixth current-limiting resistor R11, a power supply terminal of the hall sensor is connected to a working power supply (+5V), an output terminal of the hall sensor is connected to the control chip U1 (hall) through the sixth current-limiting resistor R11, the output terminal of the hall sensor is further connected to the working power supply through the second pull-up resistor R12, and the control chip can be protected through the second pull-up resistor R12 and the sixth current-limiting resistor R11. It should be noted that the utility model discloses a plug CN1, hall sensor is connected with power and control chip electricity through the plug.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and decorations can be made without departing from the principle of the invention, and these modifications and decorations are also regarded as the protection scope of the present invention.
Claims (10)
1. A direct current motor rotating speed regulating circuit is characterized by comprising a first filter circuit, a rectifying circuit, a second filter circuit, a voltage stabilizing circuit, a third filter circuit, a silicon controlled rectifier circuit, a feedback circuit, a zero-crossing circuit and a control chip, wherein an alternating current power supply is connected with a direct current motor sequentially through the first filter circuit, the rectifying circuit, the second filter circuit, the voltage stabilizing circuit, the third filter circuit and the silicon controlled rectifier circuit;
the feedback circuit is a Hall sensor circuit, and the Hall sensor circuit is used for converting the rotating speed of the direct current motor into a pulse signal and outputting the pulse signal to the control chip;
the silicon controlled rectifier circuit comprises a silicon controlled rectifier, a first current limiting resistor and a first pull-up resistor, wherein the anode of the silicon controlled rectifier is connected with the output end of the voltage stabilizing circuit, the cathode of the silicon controlled rectifier is connected with the direct current motor, the control electrode of the silicon controlled rectifier is connected with the control chip through the first current limiting resistor, and the anode of the silicon controlled rectifier is connected with the control electrode through the first pull-up resistor;
the zero-crossing circuit comprises a second current-limiting resistor, one end of the second current-limiting resistor is connected with the output end of the first filter circuit, and the other end of the second current-limiting resistor is connected with the control chip.
2. The DC motor speed regulating circuit according to claim 1, wherein the first filter circuit comprises a second capacitor, a third capacitor, a common mode inductor, a fourth capacitor and a fifth capacitor, and the second capacitor, the third capacitor, the common mode inductor, the fourth capacitor and the fifth capacitor form a pi-type filter circuit.
3. The dc motor speed adjustment circuit of claim 1, wherein the second filter circuit is a sixth capacitor.
4. The dc motor speed regulation circuit of claim 1 wherein the third filter circuit comprises an eighth capacitor and a ninth capacitor, the eighth capacitor and the ninth capacitor being connected in parallel.
5. The DC motor speed regulating circuit according to claim 1, wherein the voltage stabilizing circuit comprises a first voltage regulator tube, a second voltage regulator tube and a third current limiting resistor, and the first voltage regulator tube and the second voltage regulator tube are connected in parallel and then connected in series with the third current limiting resistor.
6. The direct current motor speed regulating circuit according to claim 1, further comprising a protection circuit, wherein the protection circuit comprises a protective tube and a piezoresistor, and the alternating current power supply is connected with the first filter circuit sequentially through the protective tube, the piezoresistor and the first filter circuit.
7. The direct current motor speed regulating circuit according to claim 1, further comprising a current limiting circuit, wherein the current limiting circuit comprises a first capacitor, a fourth current limiting resistor and a fifth current limiting resistor, the first capacitor and the fourth current limiting resistor are connected in parallel and then connected in series with the fifth current limiting resistor, the first capacitor is connected with an output end of the first filter circuit, and the fifth current limiting resistor is connected with an input end of the rectifier circuit.
8. The dc motor speed regulation circuit of claim 6 further comprising a first discharge circuit connected in parallel with the first filter circuit, the first discharge circuit comprising a first discharge resistor and a second discharge resistor, the first discharge resistor and the second discharge resistor connected in series.
9. The dc motor speed regulation circuit of claim 7 further comprising a second discharge circuit comprising a third discharge resistor connected in parallel with the third filter circuit.
10. The direct current motor speed regulating circuit according to claim 8, wherein the hall sensor circuit comprises a hall sensor, a second pull-up resistor and a sixth current limiting resistor, a power supply end of the hall sensor is connected with an operating power supply, an output end of the hall sensor is connected with the control chip through the sixth current limiting resistor, and the output end of the hall sensor is further connected with the operating power supply through the second pull-up resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922499982.4U CN211481181U (en) | 2019-12-31 | 2019-12-31 | Direct current motor rotating speed regulating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922499982.4U CN211481181U (en) | 2019-12-31 | 2019-12-31 | Direct current motor rotating speed regulating circuit |
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| Publication Number | Publication Date |
|---|---|
| CN211481181U true CN211481181U (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922499982.4U Active CN211481181U (en) | 2019-12-31 | 2019-12-31 | Direct current motor rotating speed regulating circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN211481181U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114421831A (en) * | 2020-10-13 | 2022-04-29 | 深圳市英维克信息技术有限公司 | Motor speed regulation board and motor system |
-
2019
- 2019-12-31 CN CN201922499982.4U patent/CN211481181U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114421831A (en) * | 2020-10-13 | 2022-04-29 | 深圳市英维克信息技术有限公司 | Motor speed regulation board and motor system |
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