Stepping motor driving power supply circuit

Abstract

The invention discloses a stepping motor driving power supply circuit which comprises a power supply circuit connected with an adapter, the power supply circuit is connected with a voltage switching circuit used for switching and outputting different voltages, and the voltage switching circuit is connected with a five-wire four-phase motor connecting circuit, a four-wire two-phase motor connecting circuit and a three-wire belt driving motor connecting circuit. The master control circuit is used for controlling the voltage switching circuit to switch the output voltage and respectively outputting motor driving signals with the five-wire four-phase motor connecting circuit, the four-wire two-phase motor connecting circuit and the three-wire belt driving motor connecting circuit; and the main control circuit is connected with a key circuit for setting characteristic parameters of the driving power supply and inputting a control instruction and a display circuit for displaying the characteristic parameters of the driving power supply and the working state of the motor, so that the function of quickly switching on site by using the same equipment for detecting the performance of different types of small-power stepping motors is realized.

Description

[Technical field]

[0001] The invention relates to a stepping motor driving power supply circuit. [Background Technology]

[0002] A stepper motor is an electromagnetic mechanical device that converts an electrical pulse signal into a corresponding angular displacement or linear displacement. The working principle is based on the magnetic interaction between the stator and the rotor. By changing the direction and sequence of the current applied to the stator winding, the rotor can be controlled to rotate in a predetermined direction and angle. Therefore, stepper motors have the advantages of high-precision positioning, simple control, direct digital control, and self-locking capabilities. They are widely used in various products in different fields such as household appliances, security monitoring, new energy electric vehicles, printers, medical analysis instruments, camera lenses, etc.

[0003] In order to ensure that the performance and reliability of the stepper motor meet the manufacturer's standards and customer requirements, it is necessary to perform drive testing on the stepper motor before it leaves the factory. However, the existing stepper motors include five-wire four-phase stepper motors, four-wire two-phase stepper motors, three-wire belt drive motors and other different categories. Different categories of stepper motors require corresponding drive power supply testing equipment for performance testing. Therefore, it is necessary to equip multiple different categories of stepper motor drive power supply testing equipment, especially the configuration of each testing station in the motor production process, operating life test, finished product sampling, sales demonstration, etc. The equipment needs to be switched frequently. At the same time, stepper motor drive power supply testing equipment has the disadvantages of being expensive, large in size, inconvenient for testing and operation, and inconvenient to carry. [Summary of the invention]

[0004] The invention overcomes the deficiencies of the prior art and provides a stepping motor driving power supply circuit.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A stepper motor drive power supply circuit, characterized in that: it includes a power supply circuit connected to an adapter, the power supply circuit is connected to a voltage switching circuit for switching outputs of different voltages, the voltage switching circuit is connected to a five-wire four-phase motor connection circuit, a four-wire two-phase motor connection circuit, and a three-wire belt drive motor connection circuit, and a main control circuit for controlling the voltage switching circuit to switch output voltages and output motor drive signals to the five-wire four-phase motor connection circuit, the four-wire two-phase motor connection circuit, and the three-wire belt drive motor connection circuit respectively, the main control circuit is connected to a key circuit for setting drive power characteristic parameters and inputting control instructions, and a display circuit for displaying drive power characteristic parameters and motor working status.

[0007] The stepping motor driving power supply circuit as described above is characterized in that: the main control circuit is connected to a burning circuit for burning a program into the main control circuit.

[0008] A stepper motor drive power supply circuit as described above is characterized in that: the power supply circuit includes a power interface POWER connected to an adapter, the power interface POWER pin 1 is respectively connected to the positive end of an electrolytic capacitor E5, one end of a capacitor C6, and pin 1 of a power chip IC4 through a resistor R8, the power chip IC4 pin 3 is respectively connected to the positive end of an electrolytic capacitor E6, one end of a capacitor C7, and a VDD power supply, the negative end of an electrolytic capacitor E5, the other end of a capacitor C6, the power chip IC4 pin 2, the negative end of an electrolytic capacitor E6, and the other end of a capacitor C7 are respectively grounded; the power interface POWER pin 1 is respectively connected to the positive end of an electrolytic capacitor E1, one end of a capacitor C2, one end of a resistor R2, and pin 1 of a switching power regulator IC1 through a fuse FUSE, the switching power regulator IC1 pin 2 is respectively connected to the negative end of a diode D4 and one end of an inductor L2, and the switching power regulator IC1 pin 4 Connected to the voltage switching circuit, pin 5 of the switching power supply regulator IC1 is respectively connected to the other end of the resistor R2 and pin C of the optocoupler IC9, pin A of the optocoupler IC9 outputs the VDD power supply, pin K of the optocoupler IC9 is respectively connected to the main control circuit and one end of the resistor R22 through the resistor R20, the other end of the resistor R22 is connected to the base of the transistor Q1, the collector of the transistor Q1 is respectively connected to one end of the capacitor C4, the positive end of the electrolytic capacitor E3, and the other end of the inductor L2 through the resistor R21, the positive end of the electrolytic capacitor E3 is respectively connected to the five-wire four-phase motor connection circuit, the four-wire two-phase motor connection circuit, and the three-wire belt drive motor connection circuit, the power interface POWER pin 2, the negative end of the electrolytic capacitor E1, the other end of the capacitor C2, the positive end of the diode D4, pin 3 of the switching power supply regulator IC1, pin E of the optocoupler IC9, the emitter of the transistor Q1, the other end of the capacitor C4, and the negative end of the electrolytic capacitor E3 are grounded respectively.

[0009] A stepper motor drive power supply circuit as described above is characterized in that: the voltage switching circuit includes relay RELAY1, relay RELAY2, and relay RELAY3, and the relay RELAY1 pin 1 is respectively connected to the power supply circuit, one end of the resistor R12, one end of the resistor R24, one end of the resistor R25, and one end of the capacitor C3 through the resistor R5, and the other end of the resistor R25 is respectively connected to the other end of the capacitor C3, the five-wire four-phase motor connection circuit, the four-wire two-phase motor connection circuit, and the three-wire belt drive motor connection circuit, the relay RELAY1 pin 3 is connected to the VDD power supply, the relay RELAY1 pin 5 is respectively connected to the main control circuit and the negative end of the lamp LED-5V, and the positive end of the lamp LED-5V is respectively connected to the lamp LED -12V positive terminal, LED-24V positive terminal, and one end of resistor R1 are connected, the other end of resistor R1 is connected to VDD power supply, relay RELAY1 pin 7 is grounded, relay RELAY2 pin 1 is connected to the other end of resistor R12, relay RELAY2 pin 3 is connected to VDD power supply, relay RELAY2 pin 5 is respectively connected to the main control circuit and the negative terminal of LED-12V, relay RELAY2 pin 7 is grounded, relay RELAY3 pin 1 is connected to the other end of resistor R24, relay RELAY3 pin 3 is connected to VDD power supply, relay RELAY3 pin 5 is respectively connected to the main control circuit and the negative terminal of LED-24V, and relay RELAY3 pin 7 is grounded.

[0010] A stepper motor drive power supply circuit as described above is characterized in that: a five-wire four-phase motor connection circuit includes a motor drive chip IC6, pins 1-4 of the motor drive chip IC6 are respectively connected to the main control circuit, pin 5 of the motor drive chip IC6 is grounded, pin 6 of the motor drive chip IC6 is respectively connected to pin 5 of the motor connection terminal OSC, the voltage switching circuit, and one end of the bidirectional trigger diode TVS3, the other end of the bidirectional trigger diode TVS3 is grounded, pin 7 of the motor drive chip IC6 is connected to pin 4 of the motor connection terminal OSC, pin 8 of the motor drive chip IC6 is connected to pin 3 of the motor connection terminal OSC, pin 9 of the motor drive chip IC6 is connected to pin 2 of the motor connection terminal OSC, and pin 10 of the motor drive chip IC6 is connected to pin 1 of the motor connection terminal OSC.

[0011] A stepper motor drive power supply circuit as described above is characterized in that: a four-wire two-phase motor connection circuit includes a motor drive chip IC5 and a motor drive chip IC7, the motor drive chip IC5 pin 1 is respectively connected to the motor drive chip IC5 pin 2 and the motor connection terminal MOTOR STEP pin 1, the motor drive chip IC5 pin 3 is respectively connected to the motor drive chip IC5 pin 4 and the motor connection terminal MOTOR STEP pin 2, the motor drive chip IC5 pin 5 is connected to the voltage switching circuit, the motor drive chip IC5 pin 6 is grounded, the motor drive chip IC5 pins 7-8 are respectively connected to the main control circuit, the motor drive chip IC7 pin 1 is respectively connected to the motor drive chip IC7 pin 2 and the motor connection terminal MOTOR STEP pin 3, the motor drive chip IC7 pin 3 is respectively connected to the motor drive chip IC7 pin 4 and the motor connection terminal MOTOR STEP pin 4, the motor drive chip IC7 pin 5 is connected to the voltage switching circuit, the motor drive chip IC7 pin 6 is grounded, and the motor drive chip IC7 pins 7-8 are respectively connected to the main control circuit.

[0012] A stepper motor drive power supply circuit as described above is characterized in that: the three-wire drive motor connection circuit includes an optocoupler IC8, the optocoupler IC8 pin A is connected to the main control circuit, the optocoupler IC8 pin K is respectively connected to the VDD power supply and one end of the resistor R9 through the resistor R7, the optocoupler IC8 pin C is respectively connected to the other end of the resistor R9 and the positive end of the diode D6, the optocoupler IC8 pin E is grounded, the cathode end of the diode D6 is connected to the motor connection terminal DC MOTOR pin 1, the motor connection terminal DC MOTOR pin 2 is grounded, and the motor connection terminal DC MOTOR pin 3 is connected to the voltage switching circuit.

[0013] A stepper motor drive power supply circuit as described above is characterized in that: the main control circuit includes a main control chip U1, pin 1 of the main control chip U1 is connected to the power supply circuit, pins 2-5 of the main control chip U1 are respectively connected to the five-wire four-phase motor connection circuit, pin 6 of the main control chip U1 is connected to the three-wire belt drive motor connection circuit, pins 8-11 of the main control chip U1 are respectively connected to the four-wire two-phase motor connection circuit, pin 12 of the main control chip U1 is grounded, pins 13-15 of the main control chip U1 are respectively connected to the burning circuit, pins 14-16 of the main control chip U1 are respectively connected to the voltage switching circuit, pins 17-29 of the main control chip U1 are respectively connected to the display circuit, and pins 30-32 of the main control chip U1 are respectively connected to the key circuit.

[0014] A stepper motor drive power supply circuit as described above is characterized in that: the key circuit includes a key K1, a key K2 and a key K3, one end of the key K1 is connected to the main control circuit, one end of the key K2 is connected to the main control circuit, one end of the key K3 is connected to the main control circuit, and the other ends of the key K1, the other ends of the key K2 and the other ends of the key K3 are grounded respectively; the display circuit includes a digital display connection terminal DIS2 and a digital display tube DIS1, the pins 1-12 of the digital display connection terminal DIS2 are connected to the main control circuit respectively, the pin 1 of the digital display tube DIS1 is connected to the pin 1 of the digital display connection terminal DIS2, and the pin 2 of the digital display tube DIS1 is connected Connected to pin 2 of the digital display connection terminal DIS2, pin 3 and pin 8 of the digital display tube DIS1 are respectively connected to the main control circuit, pin 4 of the digital display tube DIS1 is connected to pin 4 of the digital display connection terminal DIS2, pin 5 of the digital display tube DIS1 is connected to pin 3 of the digital display connection terminal DIS2, pin 6 of the digital display tube DIS1 is connected to pin 7 of the digital display connection terminal DIS2, pin 7 of the digital display tube DIS1 is connected to pin 11 of the digital display connection terminal DIS2, pin 9 of the digital display tube DIS1 is connected to pin 10 of the digital display connection terminal DIS2, and pin 10 of the digital display tube DIS1 is connected to pin 5 of the digital display connection terminal DIS2.

[0015] A stepper motor drive power supply circuit as described above is characterized in that: the burning circuit includes a diode D5, the positive terminal of the diode D5 is connected to the power supply circuit, the negative terminal of the diode D5 is respectively connected to the main control circuit and the burning terminal WR pin 1, the burning terminal WR pin 2 is grounded, and the burning terminal WR pins 3-4 are respectively connected to the main control circuit.

[0016] The beneficial effects of the present invention are:

[0017] The present invention is provided with a five-wire four-phase motor connection circuit, a four-wire two-phase motor connection circuit, and a three-wire belt drive motor connection circuit, which can realize compatible connection detection with a five-wire four-phase stepper motor, a four-wire two-phase stepper motor, a three-wire belt drive stepper motor, and a DC brushless motor; at the same time, a power supply circuit, a voltage switching circuit, a main control circuit and a key circuit are provided, and a control instruction is input to the main control circuit through the key in combination with a digital display circuit to set a variety of drive parameters, and the main control circuit then outputs a drive signal to the corresponding connection circuit according to the set drive power characteristic parameters, controls the operation of the motor to be tested to perform various performance tests, such as torque size, speed achievement, position accuracy, noise level, power, and operating life test, etc., and realizes the function of realizing on-site rapid switching of performance tests of different categories of low-power stepper motors with the same equipment. At the same time, the stepper motor drive power supply has the advantages of small size, low cost and easy to carry. [Drawings]

[0018] Figure 1 It is the principle diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the power supply circuit and voltage switching circuit of the present invention;

[0020] Figure 3 This is a schematic diagram of a five-wire four-phase motor connection circuit of the present invention;

[0021] Figure 4 This is a schematic diagram of a four-wire two-phase motor connection circuit of the present invention;

[0022] Figure 5 This is a schematic diagram of the connection circuit of the three-wire belt drive motor of the present invention;

[0023] Figure 6 A schematic diagram showing a circuit of the present invention;

[0024] Figure 7 It is a schematic diagram of the main control circuit, key circuit and burning circuit of the present invention;

[0025] Figure 8 This is a schematic diagram of the control board box. [Specific implementation method]

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, the descriptions of "preferred", "sub-preferred", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "preferred" or "sub-preferred" may explicitly or implicitly include at least one such feature.

[0028] like Figure 1 As shown, a stepper motor drive power supply circuit includes a power supply circuit 1 connected to an adapter, the power supply circuit 1 is connected to a voltage switching circuit 2 for switching outputs of different voltages, the voltage switching circuit 2 is connected to a five-wire four-phase motor connection circuit 3, a four-wire two-phase motor connection circuit 4, and a three-wire belt drive motor connection circuit 5, and a main control circuit 6 for controlling the voltage switching circuit 2 to switch output voltages and output motor drive signals to the five-wire four-phase motor connection circuit 3, the four-wire two-phase motor connection circuit 4, and the three-wire belt drive motor connection circuit 5, respectively, the main control circuit 6 is connected to a key circuit 7 for setting drive power characteristic parameters and inputting control instructions, and a display circuit 8 for displaying drive power characteristic parameters and motor working status. Among them, the main control circuit 6 is connected to a burning circuit 9 for burning programs to the main control circuit 6.

[0029] In actual use, the adapter is connected to the power supply circuit 1, and the stepper motor to be tested is connected to the corresponding connection circuit, such as connecting a five-wire four-phase stepper motor to a five-wire four-phase motor connection circuit 3, connecting a four-wire two-phase stepper motor to a four-wire two-phase motor connection circuit 4, or connecting a three-wire belt drive motor to a three-wire belt drive motor connection circuit 5. Before detection, a control instruction is input to the main control circuit 6 through the key circuit 7 to set the output voltage, operation sequence, rotation speed, duty cycle, number of rotation steps, commutation interval duration and other drive power characteristic parameters, and the setting state of the drive power characteristic parameters is displayed through the display circuit 8. After the parameter setting is completed and the detection is started, the main control circuit 6 controls the voltage switching circuit 2 to output the same working voltage as the set output voltage parameter to the corresponding connection circuit, and outputs the same drive signal as other set drive power characteristic parameters to the connection circuit to drive the stepper motor to work, thereby detecting the performance of the stepper motor. This case can perform drive detection on multiple categories of stepper motors, and can set different drive power characteristic parameters according to actual detection needs. It has the advantages of small size, low cost and easy to carry.

[0030] like Figure 8 As shown, the stepper motor drive power supply circuit of this case is arranged in the control board box 10. Among them, the adapter connection end of the power supply circuit 1 is arranged in the adapter connection end mounting hole 11 on the side of the control board box 10; the connection port of the five-wire four-phase motor connection circuit 3, the connection port of the four-wire two-phase motor connection circuit 4 and the connection port of the three-wire belt drive motor connection circuit 5 are arranged in the motor connection port mounting hole 12 on the side of the control board box 10 in sequence; the three buttons on the button circuit 7 are respectively arranged in the three button mounting holes 13 on the top surface of the control board box 10; the three voltage indicator lights of the voltage switching circuit 2 are respectively arranged in the three indicator light mounting holes 14 on the top surface of the control board box 10; the LED digital screen of the display circuit 8 is arranged on the top surface of the control board box 10 for display.

[0031] In this case, the AC220V to DC24V adapter and Figure 2 The power interface POWER connection of the power supply circuit 1 shown provides a DC24V / 2A working power supply for the stepper motor drive power supply in this case.

[0032] In this case, Figure 2 The optocoupler IC9 in the power supply circuit 1 shown plays an electrical isolation role, and the capacitor C4, the resistor R21, and the transistor Q1 in the power supply circuit 1 play a power switching and discharging function to protect the main control chip U1.

[0033] In this case, Figure 2The voltage switching circuit 2 shown can switch to output 5V, 12V or 24V voltage to power the stepper motor. The main control chip U1 controls the relay RELAY1, relay RELAY2 or relay RELAY3 to work according to the output voltage parameter, and outputs the corresponding working voltage to the stepper motor to be tested. Figure 2 The voltage switching circuit 2 shown is provided with a lamp LED-5V, a lamp LED-12V and a lamp LED-24V, and indicates the voltage of the power supply to the motor to be tested through three red LED lights.

[0034] In this case, Figure 3-5 The circuits shown are respectively a five-wire four-phase motor connection circuit 3, a four-wire two-phase motor connection circuit 4, and a three-wire belt drive motor connection circuit 5. Among them, the motor connection terminal OSC of the five-wire four-phase motor connection circuit 3 can be connected to a five-wire four-phase stepper motor, the motor connection terminal MOTOR STEP of the four-wire two-phase motor connection circuit 4 can be connected to a four-wire two-phase stepper motor, and the motor connection terminal DC MOTOR of the three-wire belt drive motor connection circuit 5 can be connected to a three-wire belt drive motor, realizing the function of compatible connection of a five-wire four-phase stepper motor, a four-wire two-phase stepper motor or a three-wire belt drive motor detection.

[0035] In this case, Figure 7 The main control chip U1 of the main control circuit 6 shown is compatible with the four-phase eight-beat (1-2) driving and the four-phase four-beat (2-2) and two-phase four-beat driving modes.

[0036] In this case, Figure 6 The 5-digit LED digital screen in the display circuit 8 shown is used for modifying and viewing the power supply output characteristic parameters and indicating the operating status.

[0037] In this case, Figure 7 The button K1, button K2 and button K3 in the button circuit 7 are respectively set to the setting function, setting minus / stop function and setting plus / start function, and are used for adjusting the characteristic parameters of the output drive power supply and switching between start and stop.

[0038] Take the detection of a five-wire four-phase stepper motor as an example: Figure 2-7In actual use, the adapter is connected to the power interface POWER in the power supply circuit 1, and the 24V power input by the adapter is converted into VDD power after voltage stabilization by the power chip IC4 to supply power to other circuits; then the five-wire four-phase stepper motor to be tested is connected to the motor connection terminal OSC of the five-wire four-phase motor connection circuit 3; then the control instructions are input to the main control chip U1 of the main control circuit 6 through the buttons K1, K2 and K3 of the button circuit 7, and the output voltage, operation sequence, rotation speed, duty cycle, number of rotation steps, commutation interval duration and other driving power characteristic parameters are set respectively, and the detection work is started after the parameters are set; at this time, the optocoupler IC9 in the power supply circuit 1 is turned on, the main control chip U1 of the main control circuit 6 controls the switching power regulator IC1 to work, and controls the corresponding relay in the voltage switching circuit 2 to work according to the set output voltage parameters, and outputs the corresponding voltage to the connection circuit; at the same time, the main control chip U1 of the main control circuit 6 outputs a driving signal to the five-wire four-phase motor connection circuit 3 according to other set driving power characteristic parameters, so that the five-wire four-phase stepper motor works and detects its motor performance.

[0039] In this case, the characteristic parameter setting operation of the driving power supply is as follows:

[0040] After plugging in the working power supply, the LED digital screen lights up. Touch the "Set" button to turn the page to view 6 parameters such as output voltage, operation sequence, rotation speed, duty cycle, number of rotation steps, and commutation interval. Press and hold "Set" for 3 seconds to enter the parameter setting interface (release when the screen starts to flash); touch the "Set" button to turn to the next page, and use "Stop-" and "Start+" to set options for each page. Each parameter setting interface is displayed as follows:

[0041] 1. "U--12" in parameter setting interface 1 indicates that the output voltage is 12V. When the output voltage is 5V or 24V, it can be adjusted to "U--05" or "U--24";

[0042] 2. In parameter setting interface 2, press the "Stop-" and "Start+" buttons to select the following output modes;

[0043] "11---|" indicates the output sequence is: 5-wire 4-phase motor → run 1-2 forward,

[0044] "12--|-" indicates the output sequence is: 5-wire 4-phase motor → run 1-2 reverse,

[0045] "13--H" means the output sequence is: 5-wire 4-phase motor → run 1-2 cycles forward and reverse.

[0046] "21---|" indicates the output sequence is: 5-wire 4-phase motor → run 2-2 forward,

[0047] "22--|-" indicates the output sequence is: 5-wire 4-phase motor → run 2-2 reverse,

[0048] "23--H" means the output sequence is: 5-wire 4-phase motor → run 2-2 cycles forward and reverse.

[0049] "31---|" indicates that the output sequence is: 4-wire 2-phase motor → run 2-2 forward,

[0050] "32--|-" indicates the output sequence is: 4-wire 2-phase motor → run 2-2 reverse,

[0051] "33--H" means the output sequence is: 4-wire 2-phase motor → run 2-2 cycles forward and reverse.

[0052] "41---|" indicates output of single pulse: 3-wire belt drive motor → running forward (sine wave),

[0053] "42--|-" means output single pulse: 3-wire belt drive motor → run reverse (sine wave),

[0054] "4 3--H" means outputting a single pulse: 3-wire drives the motor → running a cycle forward and reverse (sine wave).

[0055] "51--d" means outputting a single pulse: 3-wire belt driving motor → running duty cycle can increase or decrease mode in real time.

[0056] "52--F" means output single pulse: 3-wire belt drive motor → running frequency can be increased or decreased in real time.

[0057] After setting the output sequence → short press the "Set" button to turn to the next parameter page.

[0058] 3. "F-100" in parameter setting interface 3 indicates that the output frequency is: 100Hz. When other frequencies need to be output, short press the "Stop-" and "Start+" buttons to adjust the speed (1-9999Hz);

[0059] 4. "du-25" in parameter setting interface 4 means the output pulse frequency duty cycle = 25%. When other duty cycles need to be output, short press the "Stop-" and "Start+" buttons to adjust (1%-99%);

[0060] 5. "S1000" in parameter setting interface 5 means that when the motor needs to rotate forward or reverse, the driving steps are set to 1000 steps. When other rotation steps need to be output, short press the "Stop-" and "Start+" buttons to adjust (adjustable range: 10-9990 steps);

[0061] 6. "C 100" in parameter setting interface 6 means that when the forward and reverse modes are set, the interval time for stopping the output of forward and reverse pulses is set to 100*10mS=1 second.

[0062] When you need to modify other interval durations, you can short press the "Stop-" and "Start+" buttons to adjust (adjustable range: 1-999*10mS);

[0063] Touch the "Set" button again to jump back to the → output voltage selection page, for example: "U--12"... After setting the above 6 parameters, press and hold the "Set" button for 3 seconds (release it when the screen stops flashing) → exit the parameter setting interface.

[0064] According to the above operation settings, after checking the 6 output parameters, you can short press "Set + / Start" to start the output of the driving power of the small stepper motor. You can also short press "Stop-" at any time during the operation to stop the output of the driving power to the small stepper motor.

[0065] On the other hand, in this case, when using this motor drive power supply to power a small motor, be sure to confirm the power supply voltage (see the 3 LED indicators on the panel for the output voltage) to avoid damage (this motor drive power supply has a built-in self-recovery fuse. If overload occurs, please turn off the power and cool it down for 1-5 minutes before using it.

[0066] When the motor drive power is output normally, the 5-digit LED digital tube will display forward or reverse rotation accordingly. If you need to debug the driver parameters, first short-press the "Stop-" key and then long-press the "Set" key for 3 seconds to enter.

[0067] When the beat sequence is not "cyclic forward and reverse", the rotation steps have no effect, that is, this parameter will only be used when there are only 4 beat sequences: 13, 23, 33, and 43, and the forward steps = reverse steps = the set "rotation steps";

[0068] When the motor under test is a common 5-wire 4-phase or 4-wire 2-phase motor, the duty cycle parameter has no effect, that is, this parameter is only used for 3-wire self-driven motors.

[0069] When the motor under test is a brushless DC motor that needs to adjust the speed by adjusting the PWM duty cycle or frequency (for example, rotating fan blades), the 51 or 52 pulse mode can be used (in this mode, the drive step number "S" parameter is invalid). In this mode, the digital display is the real-time PWM duty cycle or real-time frequency, and the speed can be adjusted in real time during operation through the "Stop-" and "Start+" buttons (stop the operation button and switch it to the "Set" button).

[0070] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A stepper motor drive power supply circuit, characterized in that: The invention comprises a power supply circuit (1) connected to an adapter, the power supply circuit (1) being connected to a voltage switching circuit (2) for switching outputs of different voltages, the voltage switching circuit (2) being connected to a five-wire four-phase motor connection circuit (3), a four-wire two-phase motor connection circuit (4), and a three-wire belt drive motor connection circuit (5), and a main control circuit (6) for controlling the voltage switching circuit (2) to switch output voltages and output motor drive signals to the five-wire four-phase motor connection circuit (3), the four-wire two-phase motor connection circuit (4), and the three-wire belt drive motor connection circuit (5), respectively, the main control circuit (6) being connected to a key circuit (7) for setting drive power characteristic parameters and inputting control instructions, and a display circuit (8) for displaying drive power characteristic parameters and motor working status.

2. A stepper motor drive power supply circuit according to claim 1, characterized in that: The main control circuit (6) is connected to a burning circuit (9) for burning a program into the main control circuit (6).

3. A stepper motor drive power supply circuit according to claim 1, characterized in that: The power supply circuit (1) comprises a power interface POWER connected to the adapter, wherein the power interface POWER pin 1 is respectively connected to the positive end of the electrolytic capacitor E5, one end of the capacitor C6, and the pin 1 of the power chip IC4 through a resistor R8, and the power chip IC4 pin 3 is respectively connected to the positive end of the electrolytic capacitor E6, one end of the capacitor C7, and the VDD power supply, and the negative end of the electrolytic capacitor E5, the other end of the capacitor C6, the power chip IC4 pin 2, the negative end of the electrolytic capacitor E6, and the other end of the capacitor C7 are respectively grounded; the power interface POWER pin 1 is respectively connected to the positive end of the electrolytic capacitor E1, one end of the capacitor C2, one end of the resistor R2, and the pin 1 of the switching power regulator IC1 through a fuse FUSE, and the switching power regulator IC1 pin 2 is respectively connected to the negative end of the diode D4 and one end of the inductor L2, and the switching power regulator IC1 pin 4 is connected to the voltage switching circuit (2), and the switching power regulator Pin 5 of the regulator IC1 is respectively connected to the other end of the resistor R2 and pin C of the optocoupler IC9, pin A of the optocoupler IC9 outputs a VDD power supply, pin K of the optocoupler IC9 is respectively connected to the main control circuit (6) and one end of the resistor R22 through a resistor R20, the other end of the resistor R22 is connected to the base of the transistor Q1, the collector of the transistor Q1 is respectively connected to one end of the capacitor C4, the positive end of the electrolytic capacitor E3, and the other end of the inductor L2 through a resistor R21, the positive end of the electrolytic capacitor E3 is respectively connected to a five-wire four-phase motor connection circuit (3), a four-wire two-phase motor connection circuit (4), and a three-wire belt drive motor connection circuit (5), and pin 2 of the power interface POWER, the negative end of the electrolytic capacitor E1, the other end of the capacitor C2, the positive end of the diode D4, pin 3 of the switching power regulator IC1, pin E of the optocoupler IC9, the emitter of the transistor Q1, the other end of the capacitor C4, and the negative end of the electrolytic capacitor E3 are respectively grounded.

4. A stepper motor drive power supply circuit according to claim 3, characterized in that: The voltage switching circuit (2) comprises a relay RELAY1, a relay RELAY2 and a relay RELAY3. The pin 1 of the relay RELAY1 is respectively connected to the power supply circuit (1), one end of the resistor R12, one end of the resistor R24, one end of the resistor R25 and one end of the capacitor C3 through a resistor R5. The other end of the resistor R25 is respectively connected to the other end of the capacitor C3, a five-wire four-phase motor connection circuit (3), a four-wire two-phase motor connection circuit (4) and a three-wire belt drive motor connection circuit (5). The pin 3 of the relay RELAY1 is connected to the VDD power supply. The pin 5 of the relay RELAY1 is respectively connected to the main control circuit (6) and the negative terminal of the LED-5V lamp. The positive terminal of the LED-5V lamp is respectively connected to the positive terminal of the LED-12V lamp. The relay RELAY1 pin 7 is connected to the main control circuit (6) and the negative terminal of the lamp LED-12V, the relay RELAY2 pin 7 is connected to the ground, the relay RELAY3 pin 1 is connected to the other end of the resistor R24, the relay RELAY3 pin 3 is connected to the VDD power supply, the relay RELAY3 pin 5 is connected to the main control circuit (6) and the negative terminal of the lamp LED-24V, and the relay RELAY3 pin 7 is connected to the ground, the relay RELAY3 pin 1 is connected to the other end of the resistor R24, the relay RELAY3 pin 3 is connected to the VDD power supply, the relay RELAY3 pin 5 is connected to the main control circuit (6) and the negative terminal of the lamp LED-24V, and the relay RELAY3 pin 7 is connected to the ground.

5. A stepper motor drive power supply circuit according to claim 4, characterized in that: The five-wire four-phase motor connection circuit (3) comprises a motor drive chip IC6, wherein pins 1-4 of the motor drive chip IC6 are respectively connected to the main control circuit (6), pin 5 of the motor drive chip IC6 is grounded, pin 6 of the motor drive chip IC6 is respectively connected to pin 5 of the motor connection terminal OSC, the voltage switching circuit (2), and one end of the bidirectional trigger diode TVS3, the other end of the bidirectional trigger diode TVS3 is grounded, pin 7 of the motor drive chip IC6 is connected to pin 4 of the motor connection terminal OSC, pin 8 of the motor drive chip IC6 is connected to pin 3 of the motor connection terminal OSC, pin 9 of the motor drive chip IC6 is connected to pin 2 of the motor connection terminal OSC, and pin 10 of the motor drive chip IC6 is connected to pin 1 of the motor connection terminal OSC.

6. A stepper motor drive power supply circuit according to claim 4, characterized in that: The four-wire two-phase motor connection circuit (4) comprises a motor drive chip IC5 and a motor drive chip IC7, wherein the pin 1 of the motor drive chip IC5 is respectively connected to the pin 2 of the motor drive chip IC5 and the motor connection terminal MOTOR STEP pin 1, the pin 3 of the motor drive chip IC5 is respectively connected to the pin 4 of the motor drive chip IC5 and the motor connection terminal MOTOR STEP pin 2, the pin 5 of the motor drive chip IC5 is connected to the voltage switching circuit (2), the pin 6 of the motor drive chip IC5 is grounded, the pins 7-8 of the motor drive chip IC5 are respectively connected to the main control circuit (6), the pin 1 of the motor drive chip IC7 is respectively connected to the pin 2 of the motor drive chip IC7 and the motor connection terminal MOTOR STEP pin 3, the pin 3 of the motor drive chip IC7 is respectively connected to the pin 4 of the motor drive chip IC7 and the motor connection terminal MOTORSTEP pin 4, the pin 5 of the motor drive chip IC7 is connected to the voltage switching circuit (2), the pin 6 of the motor drive chip IC7 is grounded, and the pins 7-8 of the motor drive chip IC7 are respectively connected to the main control circuit (6).

7. A stepper motor drive power supply circuit according to claim 4, characterized in that: The three-wire belt drive motor connection circuit (5) includes an optocoupler IC8, wherein a pin A of the optocoupler IC8 is connected to a main control circuit (6), a pin K of the optocoupler IC8 is respectively connected to a VDD power supply and one end of a resistor R9 via a resistor R7, a pin C of the optocoupler IC8 is respectively connected to the other end of the resistor R9 and a positive end of a diode D6, a pin E of the optocoupler IC8 is grounded, a negative end of the diode D6 is connected to a motor connection terminal DC MOTOR pin 1, a motor connection terminal DC MOTOR pin 2 is grounded, and a motor connection terminal DC MOTOR pin 3 is connected to a voltage switching circuit (2).

8. A stepper motor drive power supply circuit according to claim 4, characterized in that: The main control circuit (6) includes a main control chip U1, wherein pin 1 of the main control chip U1 is connected to the power supply circuit (1), pins 2-5 of the main control chip U1 are respectively connected to the five-wire four-phase motor connection circuit (3), pin 6 of the main control chip U1 is connected to the three-wire belt drive motor connection circuit (5), pins 8-11 of the main control chip U1 are respectively connected to the four-wire two-phase motor connection circuit (4), pin 12 of the main control chip U1 is grounded, pins 13-15 of the main control chip U1 are respectively connected to the burning circuit (9), pins 14-16 of the main control chip U1 are respectively connected to the voltage switching circuit (2), pins 17-29 of the main control chip U1 are respectively connected to the display circuit (8), and pins 30-32 of the main control chip U1 are respectively connected to the key circuit (7).

9. A stepper motor drive power supply circuit according to claim 4, characterized in that: The key circuit (7) comprises a key K1, a key K2 and a key K3, one end of the key K1 is connected to the main control circuit (6), one end of the key K2 is connected to the main control circuit (6), one end of the key K3 is connected to the main control circuit (6), and the other ends of the key K1, the other ends of the key K2 and the other ends of the key K3 are grounded respectively; the display circuit (8) comprises a digital display connection terminal DIS2 and a digital display tube DIS1, pins 1-12 of the digital display connection terminal DIS2 are connected to the main control circuit (6), pin 1 of the digital display tube DIS1 is connected to pin 1 of the digital display connection terminal DIS2, and pin 2 of the digital display tube DIS1 is connected to the digital display connection terminal DIS2. Terminal DIS2 is connected to pin 2, digital display tube DIS1 pin 3 and pin 8 are respectively connected to the main control circuit (6), digital display tube DIS1 pin 4 is connected to digital display connection terminal DIS2 pin 4, digital display tube DIS1 pin 5 is connected to digital display connection terminal DIS2 pin 3, digital display tube DIS1 pin 6 is connected to digital display connection terminal DIS2 pin 7, digital display tube DIS1 pin 7 is connected to digital display connection terminal DIS2 pin 11, digital display tube DIS1 pin 9 is connected to digital display connection terminal DIS2 pin 10, and digital display tube DIS1 pin 10 is connected to digital display connection terminal DIS2 pin 5.

10. A stepper motor drive power supply circuit according to claim 2, characterized in that: The burning circuit (9) comprises a diode D5, wherein the positive terminal of the diode D5 is connected to the power supply circuit (1), the negative terminal of the diode D5 is respectively connected to the main control circuit (6) and the burning terminal WR pin 1, the burning terminal WR pin 2 is grounded, and the burning terminal WR pins 3-4 are respectively connected to the main control circuit (6).

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