Multi-functional motor control circuit

Abstract

Multifunctional motor control circuit, the utility model relates to motor drive technical field, the utility model discloses in order to solve the problem of poor control performance, the short circuit operation life of prior art;Motor control circuit function single control poor performance etc. The utility model discloses a motor drive circuit and current -limiting protection circuit, and motor drive circuit and current -limiting protection circuit electricity is connected;Motor drive circuit includes rectifier protection circuit, DC-DC conversion circuit and relay control circuit, and relay control circuit and rectifier protection circuit are connected with DC-DC conversion circuit electricity respectively. The utility model is used for motor control.

Description

Technical Field

[0001] This utility model relates to the field of motor drive technology, specifically to a multifunctional motor control circuit. Background Technology

[0002] Existing motor drive circuits commonly employ control methods such as two-wire reverse polarity control, three-wire one-control, and three-wire two-control, each corresponding to a specific circuit. These motor control circuits suffer from several drawbacks: high cost, limiting their market application; poor control performance and short circuit lifespan; and limited functionality, resulting in a poor user experience. Utility Model Content

[0003] The purpose of this invention is to solve the problem of poor control performance and limited functionality of existing motor control circuits, and to provide a multifunctional motor control circuit.

[0004] The technical solution adopted by this utility model to solve the above problems is: a multifunctional motor control circuit, including a motor drive circuit and a current limiting protection circuit, wherein the motor drive circuit and the current limiting protection circuit are electrically connected; the motor drive circuit includes a rectifier protection circuit, a DC-DC conversion circuit and a relay control circuit, wherein the relay control circuit and the rectifier protection circuit are respectively electrically connected to the DC-DC conversion circuit.

[0005] Preferably, the rectifier protection circuit includes a circuit connector CN2, a first rectifier bridge BR1, a first diode D1, a second diode D2, a seventh diode D7, a first fuse F, a second fuse F2, a first electrolytic capacitor E1, and a first capacitor C1;

[0006] The fifth pin of the circuit connector CN2 is connected to the second AC pin of the first rectifier bridge BR1, the sixth pin of the circuit connector CN2 is connected to the third AC pin of the first rectifier bridge BR1, and the fourth pin of the circuit connector CN2 is grounded after passing through the seventh diode D7.

[0007] The fourth pin of the first rectifier bridge BR1 is connected to the seventh diode D7 and then grounded. The first pin of the first rectifier bridge BR1 is connected to the first fuse F after passing through the first diode D1.

[0008] One end of the second diode D2 is connected to the first diode D1, and the other end of the second diode D2 is connected to the seventh diode D7.

[0009] Preferably, the first fuse F is connected to the second fuse F2, the second fuse F2 is connected to the first electrolytic capacitor E1 and the first capacitor C1, and the other ends of the first electrolytic capacitor E1 and the first capacitor C1 are connected to ground.

[0010] Preferably, the DC-DC conversion circuit includes a circuit connector CN1, a voltage regulation chip U1, a third diode D3, a ninth diode D9, a tenth diode D10, a first inductor L1, a second capacitor C2, a second electrolytic capacitor E2, a third supercapacitor E3, a fourth supercapacitor E4, a fifth supercapacitor E5, a sixth supercapacitor E6, a first resistor R1, a second resistor R2, and a third resistor R3.

[0011] The first pin of the voltage regulator chip U1 is connected to the sixth pin of the circuit connector CN1; the third pin of the voltage regulator chip U1 is grounded; the fifth and sixth pins of the voltage regulator chip U1 are connected and then grounded.

[0012] The ninth diode D9, the tenth diode D10, the twelfth diode D12, and the thirteenth diode D13 together form a rectifier bridge;

[0013] One end of the twelfth diode D12 is connected to the second pin of the circuit connector CN1, and one end of the ninth diode D9 is connected to the fourth pin of the voltage regulation chip U1 through the second resistor R2; the second resistor R2 is also connected to the third resistor R3 and the first resistor R1 before being grounded.

[0014] Preferably, the first inductor L1 and the second capacitor C2 are connected in parallel to form a filter circuit. One end of the first inductor L1 is connected to the tenth diode D10, and the other end is connected to the second pin of the voltage regulation chip U1.

[0015] The anode of the thirteenth diode D13 is also connected to the third supercapacitor E3, the fourth supercapacitor E4, the fifth supercapacitor E5, and the sixth supercapacitor E6.

[0016] The three supercapacitors E3 are connected in parallel with the seventeenth resistor R17, the four supercapacitors E4 are connected in parallel with the eighteenth resistor R18, the five supercapacitors E5 are connected in parallel with the nineteenth resistor R19, the six supercapacitors E6 are connected in parallel with the twentieth resistor R20, and one end of the six supercapacitors E6 and the twentieth resistor R20 is grounded.

[0017] Preferably, the relay control circuit includes a relay JD1, a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a fourth capacitor C4, a fifth capacitor C5, a fifth diode D5, a sixth diode D6, an eighth diode D8, a circuit connector M1, and a circuit connector CN3;

[0018] The base of the first transistor T1 is connected to the tenth resistor R10 and the eleventh resistor R11, the emitter of the first transistor T1 is grounded, and the collector of the first transistor T1 is connected to the twelfth resistor R12.

[0019] The twelfth resistor R12 is connected to the base of the third transistor T3, the emitter of the third transistor T3 is grounded, and the collector of the third transistor T3 is connected to the thirteenth resistor R13.

[0020] The base of the second transistor T2 is connected to the thirteenth resistor R13, the emitter of the second transistor T2 is grounded, and the collector of the second transistor T2 is connected to the first pin of the circuit connector M1.

[0021] The base of the fourth transistor T4 is connected to the eighth resistor R8, the emitter of the fourth transistor T4 is grounded, and the collector of the fourth transistor T4 is connected to the node of the tenth resistor R10 and the eleventh resistor R11.

[0022] One end of the sixth capacitor C6 is connected to the base node of the twelfth resistor R12 and the third transistor T3, and the other end of the sixth capacitor C6 is connected to the fourth capacitor C4 and the fifth capacitor C5.

[0023] The fourth capacitor C4 is connected to the eighth diode D8, which is connected to the power input VCC. At the same time, the power input VCC is connected to the node of the second diode D2 and the seventh diode D7 of the rectifier protection circuit.

[0024] The fifth capacitor C5 is connected to the base of the fourth transistor T4 and the node of the ninth resistor R9 after passing through the eighth resistor R8. The ninth resistor R9 and the eighth capacitor C8 are connected in parallel.

[0025] Preferably, the first pin of the relay JD1 is connected to the first pin of the circuit connector CN3, the tenth pin of the relay JD1 is connected to the third pin of the circuit connector CN3, and the second pin of the circuit connector CN3 is grounded.

[0026] The second pin of relay JD1 is connected to one end of the fifth diode D5 and grounded; the ninth pin of relay JD1 is connected to the other end of the fifth diode D5.

[0027] The fifth pin of relay JD1 is connected to the seventh resistor R7, the seventh resistor R7 is connected to the sixth resistor R6, the sixth resistor R6 is connected to the seventh capacitor C7, the seventh capacitor C7 and the sixth diode D6 are connected in parallel, one end of the sixth diode D6 is grounded, and the other end of the sixth diode D6 is connected to the nodes of the tenth diode D10 and the twelfth diode D12 of the DC-DC converter circuit after passing through the fourth resistor R4 and the fifth resistor R5.

[0028] The node connecting the emitter of the first transistor T1 and the tenth resistor R10 is connected to one end of the first inductor L1 of the DC-DC converter circuit.

[0029] The sixth pin of relay JD1 is connected to the second pin of circuit connector M1; the fifth pin of circuit connector M1 is grounded.

[0030] The third pin of circuit connector M1 is connected to the nodes of the tenth diode D10 and the twelfth diode D12 of the DC-DC converter circuit.

[0031] Preferably, the current limiting protection circuit includes a circuit connector CN1-1, a filter chip, resistors R21 (21st), R22 (22nd), R23 (23rd), R24 (24th), R25 (25th), R26 (26th), R27 (27th), R28 (28th), transistor T5 (5th), transistor T6 (6th), diode D14 (14th), diode D15 (15th), diode D16 (16th), diode D17 (17th), inductor L2, electrolytic capacitor E7 (7th), electrolytic capacitor E8 (8th), electrolytic capacitor E9 (9th), capacitor C10 (10th), capacitor C11 (11th), and capacitor C12 (12th).

[0032] The fourth pin of the circuit connector CN1-1 is grounded; the sixth pin of the circuit connector CN1-1 is connected to the first pin of the filter chip via the seventeenth diode D17.

[0033] One end of the eighth electrolytic capacitor E8 is connected to the seventeenth diode D17, and the other end of the eighth electrolytic capacitor E8 is connected to the second inductor L2 after passing through the fourteenth diode D14.

[0034] One end of the second inductor L2 is connected to the twenty-fourth resistor R24, and the other end is connected to the second pin of the filter chip.

[0035] Preferably, the 21st resistor R21, the 22nd resistor R22, and the 23rd resistor R23 are connected in series and then connected in parallel with the 7th electrolytic capacitor E7, the 9th electrolytic capacitor E9, and the 10th capacitor C10, respectively.

[0036] The base of the fifth transistor T5 is connected to the twenty-fifth resistor R25 after passing through the fifteenth diode D15. The collector of the fifth transistor T5 is connected to the fourth pin of the filter chip after passing through the twenty-ninth resistor R29. The emitter of the fifth transistor T5 is connected to the eleventh capacitor C11. The eleventh capacitor C11 and the twenty-sixth resistor R26 are connected in parallel and then grounded.

[0037] The base of the sixth transistor T6 is connected to the twenty-seventh resistor R27 after passing through the sixteenth diode D16. The collector of the sixth transistor T6 is connected to the fourth pin of the filter chip after passing through the thirtieth resistor R30. The emitter of the sixth transistor T6 is connected to the twelfth capacitor C12. The twelfth capacitor C12 and the twenty-eighth resistor R28 are connected in parallel and then grounded.

[0038] The twenty-fifth resistor R25 and the twenty-seventh resistor R27 are connected in parallel and then connected to the second pin of the filter chip.

[0039] Preferably, the motor control circuit further includes a travel limit switch and a position alarm circuit, wherein the travel limit switch and the position alarm circuit include a connector and a position switch;

[0040] The connector is a 6-pin connector; connector pin 1 connects to the position switch M12 circuit; connector pin 2 connects to the position switch GND circuit; connector pin 3 connects to the position switch J110 circuit.

[0041] Connector pin 4 is connected to the position switch GY line; connector pin 5 is connected to the position switch WT line; connector pin 6 is connected to the position switch BN line.

[0042] This utility model has the following beneficial technical effects:

[0043] This invention uses a rectifier bridge and a diode to ensure a consistent power supply to VIN regardless of whether the power input is AC or DC. Various control methods determine the high and low potentials of VCC to control the forward and reverse rotation of the motor. This invention integrates four functions into a single multi-functional control circuit: two-wire polarity reversal, three-wire one-control, three-wire two-control, and power-off reset. It is simple to manufacture and stock, and has strong compatibility for field use.

[0044] This utility model's motor control methods differ across three-wire one-control, three-phase two-control, and reverse polarity control, all using power input through terminals 4, 5, and 6 of CN2 to ensure VIN is energized. VCC has high and low voltage options. When VCC is high, the logic relationship formed by transistors T4, T1, T3, and T2 connects to one end of M1, resulting in a high potential and the motor rotating forward. When VCC is low, the logic relationship formed by transistors T4, T1, T3, and T2 connects to one end of M1, resulting in a low potential and the motor rotating in reverse. The power-off reset function provides power to VIN via a supercapacitor when power is off, at which point VCC is low, and the motor rotates in reverse. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the rectifier protection circuit of this utility model;

[0046] Figure 2 This is a schematic diagram of the DC-DC conversion circuit of this utility model;

[0047] Figure 3 This is a schematic diagram of the relay control circuit of this utility model;

[0048] Figure 4 This is a schematic diagram of the filter circuit of this utility model;

[0049] Figure 5 This is a schematic diagram of the travel limit switch and its arrival alarm circuit of this utility model;

[0050] Figure 6 This is the control principle diagram of this utility model;

[0051] Figure 7 This is the circuit schematic diagram of this utility model. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. The specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0053] Specific implementation method one: Combining Figures 1 to 7 This embodiment describes a multifunctional motor control circuit, which includes a motor drive circuit and a current limiting protection circuit, which are electrically connected. The motor drive circuit includes a rectifier protection circuit, a DC-DC converter circuit, and a relay control circuit, which are electrically connected to the DC-DC converter circuit.

[0054] In a preferred embodiment, the rectifier protection circuit includes a circuit connector CN2, a first rectifier bridge BR1, a first diode D1, a second diode D2, a seventh diode D7, a first fuse F, a second fuse F2, a first electrolytic capacitor E1, and a first capacitor C1.

[0055] The fifth pin of the circuit connector CN2 is connected to the second AC pin of the first rectifier bridge BR1, the sixth pin of the circuit connector CN2 is connected to the third AC pin of the first rectifier bridge BR1, and the fourth pin of the circuit connector CN2 is grounded after passing through the seventh diode D7.

[0056] The fourth pin of the first rectifier bridge BR1 is connected to the seventh diode D7 and then grounded. The first pin of the first rectifier bridge BR1 is connected to the first fuse F after passing through the first diode D1.

[0057] One end of the second diode D2 is connected to the first diode D1, and the other end of the second diode D2 is connected to the seventh diode D7.

[0058] The first fuse F is connected to the second fuse F2, the second fuse F2 is connected to the first electrolytic capacitor E1 and the first capacitor C1, and the other ends of the first electrolytic capacitor E1 and the first capacitor C1 are connected to ground.

[0059] Specific Implementation Method Two: Combining Figures 1 to 7 This embodiment describes a DC-DC conversion circuit that includes a circuit connector CN1, a voltage regulator chip U1, a third diode D3, a ninth diode D9, a tenth diode D10, a first inductor L1, a second capacitor C2, a second electrolytic capacitor E2, a third supercapacitor E3, a fourth supercapacitor E4, a fifth supercapacitor E5, a sixth supercapacitor E6, a first resistor R1, a second resistor R2, and a third resistor R3.

[0060] The first pin of the voltage regulator chip U1 is connected to the sixth pin of the circuit connector CN1; the third pin of the voltage regulator chip U1 is grounded; the fifth and sixth pins of the voltage regulator chip U1 are connected and then grounded.

[0061] The ninth diode D9, the tenth diode D10, the twelfth diode D12, and the thirteenth diode D13 together form a rectifier bridge;

[0062] One end of the twelfth diode D12 is connected to the second pin of the circuit connector CN1, and one end of the ninth diode D9 is connected to the fourth pin of the voltage regulation chip U1 through the second resistor R2; the second resistor R2 is also connected to the third resistor R3 and the first resistor R1 before being grounded.

[0063] The first inductor L1 and the second capacitor C2 are connected in parallel to form a filter circuit. One end of the first inductor L1 is connected to the tenth diode D10, and the other end is connected to the second pin of the voltage regulation chip U1.

[0064] The anode of the thirteenth diode D13 is also connected to the third supercapacitor E3, the fourth supercapacitor E4, the fifth supercapacitor E5, and the sixth supercapacitor E6.

[0065] The three supercapacitors E3 are connected in parallel with the seventeenth resistor R17, the four supercapacitors E4 are connected in parallel with the eighteenth resistor R18, the five supercapacitors E5 are connected in parallel with the nineteenth resistor R19, the six supercapacitors E6 are connected in parallel with the twentieth resistor R20, and one end of the six supercapacitors E6 and the twentieth resistor R20 is grounded.

[0066] The other components and connections are the same as in Specific Implementation Method 1.

[0067] Specific implementation method three: Combining Figures 1 to 7 This embodiment describes a relay control circuit that includes a relay JD1, a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a fourth capacitor C4, a fifth capacitor C5, a fifth diode D5, a sixth diode D6, an eighth diode D8, a circuit connector M1, and a circuit connector CN3.

[0068] The base of the first transistor T1 is connected to the tenth resistor R10 and the eleventh resistor R11, the emitter of the first transistor T1 is grounded, and the collector of the first transistor T1 is connected to the twelfth resistor R12.

[0069] The twelfth resistor R12 is connected to the base of the third transistor T3, the emitter of the third transistor T3 is grounded, and the collector of the third transistor T3 is connected to the thirteenth resistor R13.

[0070] The base of the second transistor T2 is connected to the thirteenth resistor R13, the emitter of the second transistor T2 is grounded, and the collector of the second transistor T2 is connected to the first pin of the circuit connector M1.

[0071] The base of the fourth transistor T4 is connected to the eighth resistor R8, the emitter of the fourth transistor T4 is grounded, and the collector of the fourth transistor T4 is connected to the node of the tenth resistor R10 and the eleventh resistor R11.

[0072] One end of the sixth capacitor C6 is connected to the base node of the twelfth resistor R12 and the third transistor T3, and the other end of the sixth capacitor C6 is connected to the fourth capacitor C4 and the fifth capacitor C5.

[0073] The fourth capacitor C4 is connected to the eighth diode D8, which is connected to the power input VCC. At the same time, the power input VCC is connected to the node of the second diode D2 and the seventh diode D7 of the rectifier protection circuit.

[0074] The fifth capacitor C5 is connected to the base of the fourth transistor T4 and the node of the ninth resistor R9 after passing through the eighth resistor R8. The ninth resistor R9 and the eighth capacitor C8 are connected in parallel.

[0075] The first pin of relay JD1 is connected to the first pin of circuit connector CN3, the tenth pin of relay JD1 is connected to the third pin of circuit connector CN3, and the second pin of circuit connector CN3 is grounded.

[0076] The second pin of relay JD1 is connected to one end of the fifth diode D5 and grounded; the ninth pin of relay JD1 is connected to the other end of the fifth diode D5.

[0077] The fifth pin of relay JD1 is connected to the seventh resistor R7, the seventh resistor R7 is connected to the sixth resistor R6, the sixth resistor R6 is connected to the seventh capacitor C7, the seventh capacitor C7 and the sixth diode D6 are connected in parallel, one end of the sixth diode D6 is grounded, and the other end of the sixth diode D6 is connected to the nodes of the tenth diode D10 and the twelfth diode D12 of the DC-DC converter circuit after passing through the fourth resistor R4 and the fifth resistor R5.

[0078] The node connecting the emitter of the first transistor T1 and the tenth resistor R10 is connected to one end of the first inductor L1 of the DC-DC converter circuit.

[0079] The sixth pin of relay JD1 is connected to the second pin of circuit connector M1; the fifth pin of circuit connector M1 is grounded.

[0080] The third pin of circuit connector M1 is connected to the nodes of the tenth diode D10 and the twelfth diode D12 of the DC-DC converter circuit.

[0081] The other components and connections are the same as in Specific Implementation Method 1.

[0082] Specific implementation method four: Combination Figures 1 to 7 This embodiment describes a current-limiting protection circuit that includes a circuit connector CN1-1, a filter chip, resistors R21 (21st), R22 (22nd), R23 (23rd), R24 (24th), R25 (25th), R26 (26th), R27 (27th), R28 (28th), transistors T5 (5th), T6 (6th), diodes D14 (14th), D15 (15th), D16 (16th), D17 (17th), inductor L2, electrolytic capacitors E7 (7th), E8 (8th), E9 (9th), C10 (10th), C11 (11th), and C12 (12th).

[0083] The fourth pin of the circuit connector CN1-1 is grounded; the sixth pin of the circuit connector CN1-1 is connected to the first pin of the filter chip via the seventeenth diode D17.

[0084] One end of the eighth electrolytic capacitor E8 is connected to the seventeenth diode D17, and the other end of the eighth electrolytic capacitor E8 is connected to the second inductor L2 after passing through the fourteenth diode D14.

[0085] One end of the second inductor L2 is connected to the twenty-fourth resistor R24, and the other end is connected to the second pin of the filter chip.

[0086] The 21st resistor R21, the 22nd resistor R22, and the 23rd resistor R23 are connected in series and then connected in parallel with the 7th electrolytic capacitor E7, the 9th electrolytic capacitor E9, and the 10th capacitor C10, respectively.

[0087] The base of the fifth transistor T5 is connected to the twenty-fifth resistor R25 after passing through the fifteenth diode D15. The collector of the fifth transistor T5 is connected to the fourth pin of the filter chip after passing through the twenty-ninth resistor R29. The emitter of the fifth transistor T5 is connected to the eleventh capacitor C11. The eleventh capacitor C11 and the twenty-sixth resistor R26 are connected in parallel and then grounded.

[0088] The base of the sixth transistor T6 is connected to the twenty-seventh resistor R27 after passing through the sixteenth diode D16. The collector of the sixth transistor T6 is connected to the fourth pin of the filter chip after passing through the thirtieth resistor R30. The emitter of the sixth transistor T6 is connected to the twelfth capacitor C12. The twelfth capacitor C12 and the twenty-eighth resistor R28 are connected in parallel and then grounded.

[0089] The twenty-fifth resistor R25 and the twenty-seventh resistor R27 are connected in parallel and then connected to the second pin of the filter chip.

[0090] The other components and connections are the same as in Specific Implementation Method 1.

[0091] Specific Implementation Method Five: Combining Figures 1 to 7 This embodiment describes a motor control circuit that further includes a travel limit switch and a position alarm circuit, wherein the travel limit switch and position alarm circuit include a connector and a position switch.

[0092] The connector is a 6-pin connector; connector pin 1 connects to the position switch M12 circuit; connector pin 2 connects to the position switch GND circuit, and there is also an independent GND connected by a wire, indicating a ground connection; connector pin 3 connects to the position switch J110 circuit.

[0093] Connector pin 4 is connected to the position switch GY line; connector pin 5 is connected to the position switch WT line; connector pin 6 is connected to the position switch BN line.

[0094] The other components and connections are the same as in Specific Implementation Method 1.

[0095] Specific Implementation Method Six: Combination Figures 1 to 7 For a description of this implementation method, please refer to [link / reference]. Figure 1 As shown, this circuit mainly realizes signal rectification, protection and preliminary signal processing. It may be used to convert the input AC signal into DC signal and perform some signal conditioning.

[0096] 1. Interface Section: Interface CN2 has 6 pins. Pin 6 and other pins (marked with their connection to CN4) transmit signals via a WIRE line. Pin 6 is connected to an AC pin of the rectifier bridge KBP310 for input AC signals.

[0097] 2. Rectifier Section: The KBP310 rectifier bridge has two AC pins, one connected to pin 6 of CN2 and the other to pin 5 of CN2. The rectifier bridge converts the input AC signal into a DC signal output. The negative terminal of the output is grounded and connected to D7 (SS210) for subsequent circuit transmission.

[0098] 3. Protection Section: The DC signal output from the rectifier bridge first passes through diode D1 (model SS210) and then through diode D2 (model SS210). D1 and D2 provide protection against reverse current and overvoltage, ensuring that downstream circuit components are protected from damage by abnormal current and voltage. It is then connected to VIN via fuses F (NTC) and F2 (T1A), and connected to E1 and C1 for filtering. The output voltage is marked Vim and is used for subsequent signal processing or transmission.

[0099] See Figure 2 As shown, this circuit is a DC-DC converter circuit used to convert the input voltage into a specific output voltage, and it has voltage regulation and feedback control functions.

[0100] 1. Power input section: Input interface CN1: Pin CN1 of 6 is used as the power input interface. Pin 6 is connected to the input power Vin, and pin 4 is connected to GND to introduce external power to the entire circuit.

[0101] 2. Rectification and Protection Section: The four diodes D12, D13, D9, and D10 (D12-SS24, D13-SS24, D9-SS24, D10-SS24) form a rectifier bridge to process the input voltage and prevent reverse voltage from damaging the circuit.

[0102] 3. Energy Storage and Filtering Section: Inductor L1 and Capacitor C2: Inductor L1 (100uH) and capacitor C2 (105 μF, i.e., 1uF) form an LC filter circuit to smooth the input voltage, filter out high-frequency noise, and stabilize the output voltage. Electrolytic Capacitor E2: E2 (50V 220uF) works in conjunction with the LC circuit to further store energy and filter, providing a stable DC voltage output.

[0103] 4. Chip Section: U1 (model D2576HV-ADJ) is the core voltage regulator chip. Its pin 1 (VIN) connects to the input voltage (the voltage after rectification and filtering); pin 2 (OUTPUT) is the output pin, used to output the regulated voltage; pin 3 (GND) is grounded; pin 4 (FEEDBACK) is used for feedback voltage signal to achieve closed-loop control; pin 5 (ON / OFF) is used to enable the chip. Resistors R1 (1KΩ) and R3 (680Ω) form a feedback resistor network, connected between pin 4 (FEEDBACK) of chip U1 and the output and ground, used to regulate the output voltage. E3, E4, E5, and E6 are supercapacitors used for energy storage for subsequent functions.

[0104] See Figure 3 As shown, this circuit is a relay control circuit used to control the switching of an external load (connected via M1). It is applied in scenarios requiring electrical isolation and small signal control of large current, such as motor control.

[0105] 1. Power Supply Section: VCC is the power input, supplying power to the entire circuit. Multiple grounding points (GND) are provided in the circuit to offer potential reference points.

[0106] 2. Transistor Section: T1 (591): The base is biased by a voltage divider between R10 (100K) and R11 (4.7K), the emitter is grounded, and the collector is connected to R12 (10K). Its function is switching control. T2, T3, T4 (T491): The base of T2 is connected through R7 (10K), and the emitter is grounded; the base of T3 is connected to R13 (10K), and the emitter is grounded; the base of T4 is connected through R8 (39K), the emitter is grounded, and the collector is connected to relay JD1, etc. These transistors are used for signal amplification, level conversion, and driving relays.

[0107] 3. Resistors: Numerous resistors (such as R1-R13) serve functions such as voltage division, current limiting, and biasing.

[0108] 4. Capacitor section: C4, C5, C6, C7, etc. C4 and C5 are used for power supply filtering to remove high-frequency noise in the power supply; C6 and C7 are used for signal coupling and filtering to stabilize the signal.

[0109] 5. Diode Section: D5 (M7): Connected in parallel across relay JD1, it is a freewheeling diode used to protect the circuit and prevent damage to other components from the back electromotive force generated when the relay coil is de-energized. D6 (4.7): A Zener diode used to stabilize voltage. D8 (LL4148): Used for rectification, limiting, etc.

[0110] 6. Relay section: JD1 (G5V-1-DC24) is a relay. The coil is connected to the collector of T4, etc., and the contacts are connected to the load (M1) and the power supply, etc. The contact is closed and opened by controlling the coil to control the load circuit.

[0111] 7. Connector section: CN3 and M1 are connectors. CN3 is used for external signal input or power connection; M1 is used to connect external load.

[0112] See Figure 4 As shown, in a preferred example:

[0113] 1. Input Section CN1-1 (Input Interface) Vin Pin: Used to connect external input voltage, serving as the power source for the entire circuit. GND Pin: Provides the circuit's ground reference potential, ensuring a return path for current and guaranteeing the stability of potentials at each point. Vcap Pin: Used to connect external capacitors, stabilizing the input voltage and filtering. R21, R22, R23 (Resistors): These resistors are connected in series between the input power supply and ground, potentially used for voltage division and sampling of the input voltage to provide suitable voltage signals for monitoring or control in subsequent circuits. C10 (Capacitor): Connected in parallel with R21, R22, and R23, it acts as a filter, smoothing the input voltage, removing high-frequency noise, and making the input voltage more stable. E7, E9 (Electrolytic Capacitors): Large-capacity electrolytic capacitors with charge storage and filtering functions, stabilizing the input voltage, filtering out low-frequency ripple, and providing a stable DC power supply for the circuit.

[0114] 2. Intermediate Processing Section: R24 (resistor): Works with other components to limit current, divide voltage, and regulate the current or distribute voltage in the circuit. T5 and T6 (transistors), along with surrounding resistors (such as R29 and R30) and Zener diodes (D15 and D16), form the control circuit. The transistor here can act as a switching element or a signal amplification element, controlling the circuit's on / off state or amplifying the signal according to the input signal to regulate the output. R29 and R30: Provide a suitable bias voltage to the transistor, ensuring it operates in a suitable state and stabilizing its operating point. D15 and D16 (Zener diodes): Serve as voltage regulators, providing a stable reference voltage to the transistor base and ensuring transistor stability. C11 and C12 (capacitors): Work with the Zener diodes and transistors to further stabilize the voltage and filter out high-frequency interference signals.

[0115] 3. Output section: L2 (inductor): Together with capacitors (such as E8), it forms an LC filter circuit. By utilizing the energy storage and current-impeding characteristics of the inductor, it further filters out the ripple in the output voltage, making the output voltage smoother.

[0116] 4. E8 (Electrolytic Capacitor): Works with inductor L2 for filtering and energy storage. It provides or absorbs energy when the load current changes, maintaining a stable output voltage. D17 (SS210 Diode): A Schottky diode, characterized by low forward voltage drop and fast recovery. Here, it serves as a freewheeling diode (providing a path when the inductor current changes abruptly).

[0117] 5. Chip: VIN pin: Receives the processed input voltage. OUTPUT pin: Outputs a stable voltage regulated by the circuit to power the load. GND pin: Provides the ground reference potential for the chip's internal circuitry. FB pin: Feedback pin; by connecting to an external circuit (such as a resistor divider network), a portion of the output voltage is fed back to the chip to regulate and stabilize the output voltage. ON / OFF pins: Used to control the chip's on / off state; the chip's output is enabled or disabled by an external signal (high or low level).

[0118] See Figure 5 The diagram shows a travel limit switch and a limit alarm circuit. The 6-pin connector is connected as follows: Pin 1 connects to the line marked "M12" (red box on the right). Pin 2 connects to the line marked "J110" (red box). Pin 3 connects to the line marked "GND" (red box). There is also a separate "GND" line connected via a wire, indicating a ground connection. Pin 4 connects to the line marked "GY" (red box). Pin 5 connects to the line marked "WT" (red box). Pin 6 connects to the line marked "BN" (red box).

[0119] See Figure 6 As shown, the motor drive circuit, current limiting protection circuit, travel limit switch, and position alarm circuit are connected by a circuit connector.

[0120] The circuit connector CN1 of the motor drive circuit and the circuit connector CN1-1 of the current limiting protection circuit are electrically connected by a wire; the circuit connector CN2 of the motor drive circuit and the connector of the travel limit switch and the position alarm circuit are electrically connected by a wire; the circuit connector CN3 of the motor drive circuit and the connector of the travel limit switch and the position alarm circuit are electrically connected by a wire; the circuit connector M1 of the motor drive circuit is connected to the motor.

[0121] The other components and connections are the same as in Specific Implementation Method 1.

[0122] The working principle of this utility model:

[0123] This utility model's motor control methods differ across three-wire one-control, three-phase two-control, and reverse polarity control, all using power input through terminals 4, 5, and 6 of CN2 to ensure VIN is energized. VCC has high and low voltage options. When VCC is high, the logic relationship formed by transistors T4, T1, T3, and T2 connects to one end of M1, resulting in a high potential and the motor rotating forward. When VCC is low, the logic relationship formed by transistors T4, T1, T3, and T2 connects to one end of M1, resulting in a low potential and the motor rotating in reverse. The power-off reset function provides power to VIN via a supercapacitor when power is off, at which point VCC is low, and the motor rotates in reverse. Figure 5 The switch is a position switch. When it is not in use or is turned off, it forces the motor to stop and outputs an alarm when it is in position. It is used in the power-off reset function.

[0124] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-function motor control circuit, characterized by: The motor control circuit includes a motor drive circuit and a current limiting protection circuit, which are electrically connected. The motor drive circuit includes a rectifier protection circuit, a DC-DC converter circuit, and a relay control circuit. The relay control circuit and the rectifier protection circuit are electrically connected to the DC-DC converter circuit.

2. The multi-functional motor control circuit of claim 1, wherein: The rectifier protection circuit includes a circuit connector CN2, a first rectifier bridge BR1, a first diode D1, a second diode D2, a seventh diode D7, a first fuse F, a second fuse F2, a first electrolytic capacitor E1, and a first capacitor C1; The fifth pin of the circuit connector CN2 is connected to the second AC pin of the first rectifier bridge BR1, the sixth pin of the circuit connector CN2 is connected to the third AC pin of the first rectifier bridge BR1, and the fourth pin of the circuit connector CN2 is grounded after passing through the seventh diode D7. The fourth pin of the first rectifier bridge BR1 is connected to the seventh diode D7 and then grounded. The first pin of the first rectifier bridge BR1 is connected to the first fuse F after passing through the first diode D1. One end of the second diode D2 is connected to the first diode D1, and the other end of the second diode D2 is connected to the seventh diode D7.

3. The multifunctional motor control circuit according to claim 2, characterized in that: The first fuse F is connected to the second fuse F2, the second fuse F2 is connected to the first electrolytic capacitor E1 and the first capacitor C1, and the other ends of the first electrolytic capacitor E1 and the first capacitor C1 are connected to ground.

4. The multifunctional motor control circuit according to claim 1, characterized in that: The DC-DC conversion circuit includes a circuit connector CN1, a voltage regulation chip U1, a third diode D3, a ninth diode D9, a tenth diode D10, a first inductor L1, a second capacitor C2, a second electrolytic capacitor E2, a third supercapacitor E3, a fourth supercapacitor E4, a fifth supercapacitor E5, a sixth supercapacitor E6, a first resistor R1, a second resistor R2, and a third resistor R3. The first pin of the voltage regulator chip U1 is connected to the sixth pin of the circuit connector CN1; the third pin of the voltage regulator chip U1 is grounded; the fifth and sixth pins of the voltage regulator chip U1 are connected and then grounded. The ninth diode D9, the tenth diode D10, the twelfth diode D12, and the thirteenth diode D13 together form a rectifier bridge; One end of the twelfth diode D12 is connected to the second pin of the circuit connector CN1, and one end of the ninth diode D9 is connected to the fourth pin of the voltage regulation chip U1 through the second resistor R2; the second resistor R2 is also connected to the third resistor R3 and the first resistor R1 before being grounded.

5. The multifunctional motor control circuit according to claim 4, characterized in that: The first inductor L1 and the second capacitor C2 are connected in parallel to form a filter circuit. One end of the first inductor L1 is connected to the tenth diode D10, and the other end is connected to the second pin of the voltage regulation chip U1. The anode of the thirteenth diode D13 is also connected to the third supercapacitor E3, the fourth supercapacitor E4, the fifth supercapacitor E5, and the sixth supercapacitor E6. The three supercapacitors E3 are connected in parallel with the seventeenth resistor R17, the four supercapacitors E4 are connected in parallel with the eighteenth resistor R18, the five supercapacitors E5 are connected in parallel with the nineteenth resistor R19, the six supercapacitors E6 are connected in parallel with the twentieth resistor R20, and one end of the six supercapacitors E6 and the twentieth resistor R20 is grounded.

6. The multifunctional motor control circuit according to claim 1, characterized in that: The relay control circuit includes relay JD1, first transistor T1, second transistor T2, third transistor T3, fourth transistor T4, fourth resistor R4, fifth resistor R5, sixth resistor R6, seventh resistor R7, eighth resistor R8, ninth resistor R9, fourth capacitor C4, fifth capacitor C5, fifth diode D5, sixth diode D6, eighth diode D8, circuit connector M1, and circuit connector CN3; The base of the first transistor T1 is connected to the tenth resistor R10 and the eleventh resistor R11, the emitter of the first transistor T1 is grounded, and the collector of the first transistor T1 is connected to the twelfth resistor R12. The twelfth resistor R12 is connected to the base of the third transistor T3, the emitter of the third transistor T3 is grounded, and the collector of the third transistor T3 is connected to the thirteenth resistor R13. The base of the second transistor T2 is connected to the thirteenth resistor R13, the emitter of the second transistor T2 is grounded, and the collector of the second transistor T2 is connected to the first pin of the circuit connector M1. The base of the fourth transistor T4 is connected to the eighth resistor R8, the emitter of the fourth transistor T4 is grounded, and the collector of the fourth transistor T4 is connected to the node of the tenth resistor R10 and the eleventh resistor R11. One end of the sixth capacitor C6 is connected to the base node of the twelfth resistor R12 and the third transistor T3, and the other end of the sixth capacitor C6 is connected to the fourth capacitor C4 and the fifth capacitor C5. The fourth capacitor C4 is connected to the eighth diode D8, which is connected to the power input VCC. At the same time, the power input VCC is connected to the node of the second diode D2 and the seventh diode D7 of the rectifier protection circuit. The fifth capacitor C5 is connected to the base of the fourth transistor T4 and the node of the ninth resistor R9 after passing through the eighth resistor R8. The ninth resistor R9 and the eighth capacitor C8 are connected in parallel.

7. The multifunctional motor control circuit according to claim 6, characterized in that: The first pin of relay JD1 is connected to the first pin of circuit connector CN3, the tenth pin of relay JD1 is connected to the third pin of circuit connector CN3, and the second pin of circuit connector CN3 is grounded. The second pin of relay JD1 is connected to one end of the fifth diode D5 and grounded; the ninth pin of relay JD1 is connected to the other end of the fifth diode D5. The fifth pin of relay JD1 is connected to the seventh resistor R7, the seventh resistor R7 is connected to the sixth resistor R6, the sixth resistor R6 is connected to the seventh capacitor C7, the seventh capacitor C7 and the sixth diode D6 are connected in parallel, one end of the sixth diode D6 is grounded, and the other end of the sixth diode D6 is connected to the nodes of the tenth diode D10 and the twelfth diode D12 of the DC-DC converter circuit after passing through the fourth resistor R4 and the fifth resistor R5. The node connecting the emitter of the first transistor T1 and the tenth resistor R10 is connected to one end of the first inductor L1 of the DC-DC converter circuit. The sixth pin of relay JD1 is connected to the second pin of circuit connector M1; the fifth pin of circuit connector M1 is grounded. The third pin of circuit connector M1 is connected to the nodes of the tenth diode D10 and the twelfth diode D12 of the DC-DC converter circuit.

8. The multifunctional motor control circuit according to claim 1, characterized in that: The current limiting protection circuit includes a circuit connector CN1-1, a filter chip, resistors R21 (21st), R22 (22nd), R23 (23rd), R24 (24th), R25 (25th), R26 (26th), R27 (27th), R28 (28th), transistors T5 (5th), T6 (6th), diodes D14 (14th), D15 (15th), D16 (16th), D17 (17th), inductor L2, electrolytic capacitor E7 (7th), electrolytic capacitor E8 (8th), electrolytic capacitor E9 (9th), capacitor C10 (10th), capacitor C11 (11th), and capacitor C12 (12th). The fourth pin of the circuit connector CN1-1 is grounded; the sixth pin of the circuit connector CN1-1 is connected to the first pin of the filter chip via the seventeenth diode D17. One end of the eighth electrolytic capacitor E8 is connected to the seventeenth diode D17, and the other end of the eighth electrolytic capacitor E8 is connected to the second inductor L2 after passing through the fourteenth diode D14. One end of the second inductor L2 is connected to the twenty-fourth resistor R24, and the other end is connected to the second pin of the filter chip.

9. The multifunctional motor control circuit according to claim 8, characterized in that: The 21st resistor R21, the 22nd resistor R22, and the 23rd resistor R23 are connected in series and then connected in parallel with the 7th electrolytic capacitor E7, the 9th electrolytic capacitor E9, and the 10th capacitor C10, respectively. The base of the fifth transistor T5 is connected to the twenty-fifth resistor R25 after passing through the fifteenth diode D15. The collector of the fifth transistor T5 is connected to the fourth pin of the filter chip after passing through the twenty-ninth resistor R29. The emitter of the fifth transistor T5 is connected to the eleventh capacitor C11. The eleventh capacitor C11 and the twenty-sixth resistor R26 are connected in parallel and then grounded. The base of the sixth transistor T6 is connected to the twenty-seventh resistor R27 after passing through the sixteenth diode D16. The collector of the sixth transistor T6 is connected to the fourth pin of the filter chip after passing through the thirtieth resistor R30. The emitter of the sixth transistor T6 is connected to the twelfth capacitor C12. The twelfth capacitor C12 and the twenty-eighth resistor R28 are connected in parallel and then grounded. The twenty-fifth resistor R25 and the twenty-seventh resistor R27 are connected in parallel and then connected to the second pin of the filter chip.

10. The multifunctional motor control circuit according to claim 1, characterized in that: The motor control circuit also includes a travel limit switch and a position alarm circuit, which includes a connector and a position switch. The connector is a 6-pin connector; pin 1 of the connector connects to the position switch M12 circuit. Connector pin 2 is connected to the position switch GND line; Connector pin 3 connects to the J110 position switch circuit; Connector pin 4 is connected to the position switch GY line; Connector pin 5 connects to the position switch WT circuit; Connector pin 6 is connected to the position switch BN line.

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