A multi-protection treadmill motor controller

Abstract

The present invention is a multi-protection treadmill motor controller, which makes a comprehensive protection management mechanism for the motor controller from both software and hardware directions; avoids the treadmill stalling and / or large-scale damage to the controller components caused by the failure of the motor drive power device; and guarantees the service life of the controller to the maximum extent. The motor speed control unit includes an AC input circuit, a relay control circuit, an industrial frequency rectifier circuit, a filter circuit, a motor, a power switch tube, a current detection resistor and other parts, which are used to power the motor and adjust the working state according to the command of the main control MCU and the hardware feedback of the motor protection unit; the main control MCU receives the information reported by the motor protection unit and regulates the motor according to the reported information; the motor protection unit is used to monitor the motor speed control unit, take corresponding protection measures when an abnormality is detected, and report the monitoring results to the main control MCU for analysis and processing and report to the host computer for display.

Description

Technical Field

[0001] The invention relates to the field of motor controllers, in particular to a multi-protection treadmill motor controller. Background Art

[0002] Traditional DC treadmill controllers all use a single software control or a single hardware control method for current limiting protection. This current limiting protection method cannot effectively protect the treadmill controller. If the motor drive power device fails, it is easy to cause the treadmill to suddenly stall and / or large-scale damage to the controller components. On the one hand, it may cause the user to fall or even cause personal injury. On the other hand, it will greatly shorten the service life of the control system and the treadmill. Summary of the invention

[0003] The present invention is a multi-protection treadmill motor controller. By detecting and judging the sampling resistor current, the power switch tube voltage, and the motor current, a comprehensive protection management mechanism is simultaneously provided for the motor controller from both the software and hardware directions. The treadmill is prevented from sudden stalling and / or large-scale damage to the controller components due to failure of the motor drive power device. The service life of the controller is guaranteed to the maximum extent, so that the treadmill can always keep rotating smoothly and without failure within the standard service life.

[0004] The technical solution of the present invention is achieved in this way:

[0005] A multi-protection treadmill motor controller, comprising:

[0006] Motor speed control unit, power supply, main control MCU and motor protection unit; among which:

[0007] The motor speed regulating unit includes an AC input circuit, a relay control circuit, a power frequency rectifier circuit, a filter circuit, a motor, a power switch tube, and a current detection resistor. The motor speed regulating unit is used to power the motor and adjust the working state of the motor according to the software command of the main control MCU and the hardware feedback of the motor protection unit;

[0008] The power supply includes an AC-DC switching power supply and an auxiliary power supply, which provides power to the controller function module on the one hand and provides the necessary power requirements for the host computer on the other hand;

[0009] The main control MCU, on the one hand, receives information reported by the motor protection unit from the host computer, and on the other hand, regulates the motor according to the information reported by the motor protection unit;

[0010] The motor protection unit is used to monitor the motor speed regulating unit, take corresponding protection measures when an abnormality is detected in the motor speed regulating unit, and report the monitoring result to the main control MCU.

[0011] Furthermore, the motor protection unit includes at least one group of a controller overcurrent and current limiting protection unit, a controller power switch tube short-circuit protection unit, and a controller motor short-circuit protection unit.

[0012] Furthermore, the output end of the AC input circuit is connected to the AC-DC switching power supply and the auxiliary power supply in sequence, and then connected to the main control MCU.

[0013] Furthermore, the controller has an overcurrent and current limiting protection unit, which is used to monitor the working current of the motor, take protective measures when the motor current is too high, and transmit the monitored results to the main control MCU;

[0014] The controller power switch tube short-circuit protection unit is used to monitor the state of the power switch tube in the motor speed control unit, take protection measures when the power switch tube is short-circuited, and transmit the monitoring result to the main control MCU;

[0015] The controller motor short-circuit protection unit is used to monitor the motor state, take protective measures when the motor is short-circuited, and transmit the monitoring result to the main control MCU.

[0016] Furthermore, the motor speed regulation unit comprises an AC input circuit, a relay control circuit, an industrial frequency rectification circuit (3), a filter circuit, a motor, a power switch tube, and a current detection resistor (7) which are connected in sequence; one end of the current detection resistor is connected to the motor speed regulation unit, and the other end is grounded; the drain of the power switch tube is connected to the motor, the source is connected to one end of the current detection resistor, and the gate is connected to the motor protection unit; the output end of the main control MCU is signal-connected to the input end of the relay control circuit.

[0017] Furthermore, the controller overcurrent and current limiting protection unit includes a motor overcurrent protection circuit and a drive and motor current limiting detection control circuit; the input end of the motor overcurrent protection circuit is connected to the source of the power switch tube, and the output end is connected to the input end of the main control MCU; the drive and motor current limiting detection control circuit drives and controls the gate of the power switch tube on the one hand, and collects the source signal of the power switch tube on the other hand, and the drive and motor current limiting detection control circuit is connected to the main control MCU in a bidirectional signal manner.

[0018] Furthermore, the controller power switch tube short-circuit protection unit includes a switch tube short-circuit protection circuit and a drive and motor current limiting detection control circuit; the input end of the switch tube short-circuit protection circuit is connected between the motor and the power switch tube, and the output end is divided into two paths, one is connected to the input end of the main control MCU, and the other is connected to the relay control circuit signal; the drive and motor current limiting detection control circuit drives and controls the gate of the power switch tube, and the drive and motor current limiting detection control circuit is connected to the main control MCU in a bidirectional signal manner.

[0019] Furthermore, the controller motor short-circuit protection unit includes a switch tube short-circuit protection circuit, a motor short-circuit protection circuit and a drive and motor current limiting detection control circuit; the input end of the motor short-circuit protection circuit is connected between the current detection resistor and the power switch tube, and the output end is divided into two paths, one is connected to the input end of the drive and motor current limiting detection control circuit, and the other is connected to the input end of the switch tube short-circuit protection circuit; the output end of the switch tube short-circuit protection circuit is divided into two paths, one is connected to the input end of the main control MCU, and the other is connected to the relay control circuit signal; the drive and motor current limiting detection control circuit drives and controls the gate of the power switch tube, and the drive and motor current limiting detection control circuit is connected to the main control MCU in a bidirectional signal manner.

[0020] Furthermore, the motor overcurrent protection circuit includes a comparator U6C, a resistor R201, a resistor 202, a resistor R123, and a transistor Q201;

[0021] The reverse input terminal of the comparator U6C is connected to the reference voltage, and the positive input terminal is connected to the current of the motor; the output terminal of the comparator is connected to the resistor R201 and then connected to the base of the transistor Q201, the collector of the transistor Q201 is connected in series with the resistor R202 and then connected to the +5V power supply, and the emitter of the transistor Q201 is grounded; one end of the resistor R123 is connected to the collector of the transistor Q201, and the other end is connected to the main control MCU.

[0022] Furthermore, the switch tube short-circuit protection circuit includes a comparator U6A, a comparator U6B, a resistor R20, a resistor R55, a resistor R56, a resistor R57, a resistor R58, and a voltage stabilizing diode D26;

[0023] The power switch tube driving signal is connected to the cathode of the voltage stabilizing diode D26 after passing through the resistor R20, and the anode of the voltage stabilizing diode D26 is grounded; the reverse input end of the comparator U6A is connected between the resistor R20 and the voltage stabilizing diode D26; the forward input end of the comparator U6A is connected to the reference voltage; the output end of the comparator U6A is connected to the reverse input end of the comparator U6B; the forward input end of the comparator U6B is connected to the reference voltage; the output end of the comparator U6B is divided into three paths, the first path is connected to the resistor R56 and then connected to the +15V power supply, the second path is connected to the resistor R57 and then connected to the main control MCU, the third path is connected to the resistor R58 and then connected to the motor short-circuit protection circuit, one end of the resistor R55 is connected between the comparator U6B and the resistor R57, and the other end is connected to the relay control circuit.

[0024] Further, the motor short circuit protection circuit includes a resistor R71, a resistor R69, a resistor R73, a capacitor C68, and a comparator U6D;

[0025] One end of the resistor R69 is connected to a +5V power supply, and the other end is connected to the capacitor C68 and then grounded; the motor current is connected between the resistor R69 and the capacitor C68 after passing through the resistor R71, and then connected to the reverse input end of the comparator U6D; the reference voltage is connected to the positive input end of the comparator U6D; the output end of the comparator U6D is divided into three paths, the first path is connected to the resistor R73 and then connected to a +15V power supply, the second path is connected to the resistor R58 of the switch tube short-circuit protection circuit, and the third path is connected to the drive and motor current limiting detection control circuit.

[0026] Further, the drive and motor current limiting detection control circuit includes comparator U9A, comparator U9B, comparator U9C, comparator U9D, capacitor C62, capacitor C63, capacitor C65, and resistor R72;

[0027] The current of the motor is input to the positive input terminal of the comparator U9B, and the reference voltage is input to the negative input terminal. One end of the capacitor C63 is grounded, and the other end is connected to the negative input terminal of the comparator U9B. The output end of the comparator U9B is connected to the negative input terminal of the comparator U9A. The reference voltage is input to the positive input terminal of the comparator U9A. The positive electrode of the comparator is connected to the +15V power supply, and the negative electrode is grounded; the output end of the comparator U9A is divided into two paths, one path is connected to the positive input terminal of the comparator U9D, and the other path is connected to the output end of the comparator U6D in the motor short-circuit protection circuit; one end of the capacitor C62 is grounded, and the other end is connected to the positive input terminal of the comparator U9A; the capacitor C65 is connected across the negative electrode and the output terminal of the comparator U9A;

[0028] The reference voltage is input to the positive input terminal of the comparator U9C, and the reverse input terminal is connected in series with the resistor R72 and connected to the main control MCU PWM I / O interface; the output terminal of the comparator U9C is connected to the positive input terminal of the comparator U9D, and the reference voltage is input to the reverse input terminal of the comparator U9D; the output terminal of the comparator U9D is connected to the gate of the power switch tube.

[0029] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following advantages:

[0030] 1. The treadmill controller with multiple protection functions of the present invention overcomes the shortcomings of the existing treadmill controller with a single current limiting protection controller, and provides a treadmill motor controller with multiple protection functions including power switch tube short-circuit protection, motor current limiting protection, and motor short-circuit protection. Each protection function of the controller is compatible with software and hardware dual protection, making the treadmill controller more stable and reliable in use; and improving the service life of the treadmill and controller system.

[0031] 2. The overcurrent and current limiting protection unit of the controller of the present invention monitors the treadmill current and limits the motor current within the designed range. At the same time, the main control MCU performs judgment and processing to effectively protect the motor from overcurrent caused by excessive system friction resistance or load, thereby increasing the service life of the motor and power devices.

[0032] 3. The power switch tube short-circuit protection unit of the controller of the present invention monitors the switch tube of the treadmill. Through the protection of the switch tube short-circuit protection circuit and the main control MCU, when the power switch tube is broken down and causes a short circuit, the main power relay is promptly turned off and an error is reported through the switch tube short-circuit protection circuit and the main control MCU. After power is restored, if the power switch tube is still in a breakdown state, the relay control circuit cannot be started, thereby effectively protecting the user from accidental injuries caused by system sudden surge and stall due to a short circuit of the power switch tube.

[0033] Fourth, the motor short-circuit protection unit of the controller of the present invention monitors the motor. When the motor is short-circuited, the main power relay is promptly turned off and an error is reported through the control of the motor short-circuit protection control circuit, the switch tube short-circuit protection circuit and the main control MCU. After power is turned on again, if the motor is still short-circuited, the protection is continued until the fault is eliminated. Effectively protect the risk of damage to the power switch tube due to motor short-circuit.

[0034] 5. The circuit structure of the present invention is simple, and each unit is integrated through the main control MCU, so that it has both software and hardware dual protection, and is more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a structural schematic diagram of a flow chart of the present invention;

[0037] Figure 2 This is a schematic diagram of the structure of the overcurrent and current limiting protection unit of the controller of the present invention;

[0038] Figure 3 This is a schematic diagram of the structure of the power switch short-circuit protection unit of the controller of the present invention;

[0039] Figure 4 This is a schematic diagram of the structure of the motor short-circuit protection unit of the controller of the present invention;

[0040] Figure 5 It is a schematic structural diagram of a circuit diagram of a motor overcurrent protection circuit of the present invention;

[0041] Figure 6 It is a schematic structural diagram of a circuit diagram of a switch tube short-circuit protection circuit of the present invention;

[0042] Figure 7 It is a schematic structural diagram of a circuit diagram of a motor short-circuit protection circuit of the present invention;

[0043] Figure 8 It is a schematic structural diagram of the circuit diagram of the drive and motor current limiting detection control circuit of the present invention. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Reference Figure 1 , a multi-protection treadmill motor controller, comprising:

[0046] A motor speed control unit, a main control MCU (12) and a motor protection unit; wherein:

[0047] The motor speed regulating unit comprises a motor, and is used to supply power to the motor and adjust the working state of the motor according to the software command of the main control MCU (12) and the hardware feedback of the motor protection unit;

[0048] The power supply includes an AC-DC switching power supply and an auxiliary power supply, which provides power to the controller function module on the one hand and provides the necessary power requirements for the host computer on the other hand;

[0049] The main control MCU (12) receives information reported by the motor protection unit on the one hand, and regulates the motor according to the information reported by the motor protection unit on the other hand;

[0050] The motor protection unit is used to monitor the motor speed regulating unit. When an abnormality is detected in the motor speed regulating unit, corresponding protection measures are taken, and the monitoring result is reported to the main control MCU (12) for analysis and processing and reported to the host computer for display, so that the user can clearly understand the working status of the system.

[0051] Furthermore, the motor protection unit includes at least one group of a controller overcurrent and current limiting protection unit, a controller power switch tube short-circuit protection unit, and a controller motor short-circuit protection unit.

[0052] Furthermore, it also includes an AC-DC switching power supply (13) and an auxiliary power supply (14). The output end of the AC input circuit is connected to the AC-DC switching power supply (13) and the auxiliary power supply (14) in sequence, and then connected to the main control MCU (12). The core of the power supply provides an auxiliary power supply for the controller and a required power supply voltage for the host computer.

[0053] Furthermore, the controller has an overcurrent and current limiting protection unit, which is used to monitor the working current of the motor, take protective measures when the motor current is too high, and transmit the monitoring result to the main control MCU (12);

[0054] The controller power switch tube short-circuit protection unit is used to monitor the state of the power switch tube in the motor speed control unit, take protective measures when the power switch tube is short-circuited, and transmit the monitoring result to the main control MCU (12);

[0055] The controller motor short-circuit protection unit is used to monitor the motor state, take protective measures when the motor is short-circuited, and transmit the monitoring result to the main control MCU (12).

[0056] Furthermore, the motor speed regulation unit comprises an AC input circuit (1), a relay control circuit (2), an industrial frequency rectification circuit (3), a filter circuit (4), a motor (5), a power switch tube (6), and a current detection resistor (7) which are connected in sequence by signals; one end of the current detection resistor (7) is connected to the motor speed regulation unit, and the other end is grounded; the drain of the power switch tube (6) is connected to the motor (5), the source is connected to one end of the current detection resistor (7), and the gate is connected to the drive and motor current limiting detection control protection unit; the output end of the main control MCU (12) is signal-connected to the input end of the relay control circuit (2).

[0057] The multi-protection treadmill motor (5) controller of the present invention comprises an AC input power supply (1), a relay control circuit (2), a power frequency rectifier circuit (3), a filter circuit (4), a motor (5), a power switch tube (6), and a current detection resistor (7) to form a motor (5) speed regulation power part; and a perfect motor drive speed regulation and protection mechanism such as power supply, drive, and detection is formed by unit circuits such as an AC-DC switching power supply (13), an auxiliary power supply (14), a main control MCU (12), a drive, a motor current limiting detection control circuit (11), a switch tube short circuit protection circuit (8), a motor overcurrent protection circuit (9), and a motor short circuit protection circuit (10), thereby making a comprehensive protection management mechanism from software and hardware; and avoiding the treadmill from stalling due to the failure of the motor drive power device, causing the athlete to fall and get injured, and the controller components to be damaged over a large area. The service life of the controller is guaranteed to the maximum extent, so that the treadmill can always keep rotating smoothly and not fail within the standard service life.

[0058] Reference Figure 2 The controller overcurrent and current limiting protection unit comprises a motor overcurrent protection circuit (9) and a drive and motor current limiting detection control circuit (11); the input end of the motor overcurrent protection circuit (9) is connected to the source of the power switch tube (6), and the output end is connected to the input end of the main control MCU (12); the drive and motor current limiting detection control circuit (11) drives and controls the gate signal of the power switch tube (6) on the one hand, and collects the source signal of the power switch tube (6) on the other hand; the drive and motor current limiting detection control circuit (11) is connected to the main control MCU (12) in a bidirectional signal manner.

[0059] In the circuit of AC input power supply (1), relay control circuit (2), power frequency rectification circuit (3), filter circuit (4), motor (5), power switch tube (6), and current detection resistor (7), when the current is less than the trigger value of the drive, motor current limiting detection control circuit (11) and motor overcurrent protection circuit (9), the speed regulation of the motor (5) is normal; when the friction resistance or load of the treadmill system exceeds the rated value, the motor current continues to increase, causing the voltage at the terminal of the current detection resistor (7) to exceed the set value of the drive, motor current limiting detection control circuit (11) and motor overcurrent protection circuit (9), and the motor overcurrent protection circuit (9) is triggered. The protection circuit (9) is started, the drive and motor current limiting detection control circuit (11) is engaged, and the drive and motor current limiting detection control circuit (11) is started to limit the current of the motor (5) within the designed range; the motor overcurrent protection circuit (9) sends the overcurrent signal to the main control MCU (12) for judgment and processing; when the motor (5) continues to work in the overcurrent state, the main control MCU (12) controls the drive and motor current limiting detection control circuit (11) to reduce PWM and slowly stop and report an error, and then turns off the relay control circuit (2) and disconnects the main power circuit, thereby effectively protecting the service life of the motor and power devices.

[0060] Reference Figure 3 The controller power switch tube (6) short-circuit protection unit comprises a switch tube short-circuit protection circuit (8) and a drive and motor current limiting detection control circuit (11); the input end of the switch tube short-circuit protection circuit (8) is connected between the motor (5) and the power switch tube (6), and the output end is divided into two paths, one path is connected to the input end of the main control MCU (12), and the other path is connected to the signal of the relay control circuit (2); the drive and motor current limiting detection control circuit (11) drives and controls the gate signal of the power switch tube (6), and the drive and motor current limiting detection control circuit (11) is connected to the main control MCU (12) by bidirectional signals.

[0061] When the AC input power supply (1), relay control circuit (2), power frequency rectification circuit (3), filter circuit (4), motor (5), power switch tube (6), and current detection resistor (7) circuits are working normally, the switch tube short-circuit protection circuit (8) will not be triggered to start; when the power switch tube (6) is broken down in any state and causes a short circuit, the switch tube short-circuit protection circuit (8) starts to lock the switch tube breakdown information and sends it to the relay control circuit (2) to turn off the main power relay, and at the same time sends it to the main control MCU (12) for detection and judgment. Because the power switch tube (6) is broken down and short-circuited, the main control MCU (12) turns off the drive and motor current limiting detection control circuit (11) PWM, locks the current state and reports an error.

[0062] If the system power is turned off and then turned on again, the power switch tube (6) will break down and short-circuit, so the switch tube short-circuit protection circuit (8) will start and lock, the system relay control circuit (2) will not start, and the motor (5) will not rotate. This effectively protects the user from accidental damage caused by the system sudden stall due to the short circuit of the power switch tube (6).

[0063] Reference Figure 4 The controller motor short-circuit protection unit comprises a switch tube short-circuit protection circuit (8), a motor short-circuit protection circuit (10) and a drive and motor current limiting detection control circuit (11); the input end of the motor short-circuit protection circuit (10) is connected between the current detection resistor (7) and the power switch tube (6), and the output end is divided into two paths, one of which is connected to the input end of the drive and motor current limiting detection control circuit (11), and the other is connected to the input end of the switch tube short-circuit protection circuit (8); the output end of the switch tube short-circuit protection circuit (8) is divided into two paths, one of which is connected to the input end of the main control MCU (12), and the other is connected to the signal of the relay control circuit (2); the drive and motor current limiting detection control circuit (11) drives and controls the gate signal of the power switch tube (6), and the drive and motor current limiting detection control circuit (11) is connected to the main control MCU (12) in a bidirectional signal manner.

[0064] When the AC input power supply (1), relay control circuit (2), power frequency rectifier circuit (3), filter circuit (4), motor (5), power switch tube (6), and current detection resistor (7) circuits are working normally, the motor (5) short-circuit protection control circuit (10) will not be triggered to start; when the motor (5) is short-circuited in any state, causing the motor short-circuit protection circuit (10) to trigger the start protection lock, one branch is sent to the switch tube short-circuit protection circuit (8), and the motor (5) short-circuit information is sent to the relay control circuit (2) in time, the main power relay in the relay control circuit (2) is cut off, the main power circuit is disconnected, and the main control MCU (12) is sent to the detection and judgment at the same time; the other branch is synchronously sent to the drive and motor current limiting detection control circuit (11) to (forcefully) turn off the PWM and lock it. After the main control MCU (12) detects the motor (5) short-circuit information, it turns off the PWM of the drive and motor current limiting detection control circuit (11), locks the current state and reports an error.

[0065] If the system power is turned off and then on again, the system runs the motor (5) drive circuit. Due to the short circuit of the motor (5), the motor short circuit protection circuit (10) starts the lock protection again until the fault is eliminated. This effectively protects against the risk of damage to the power switch tube (6) due to the short circuit of the motor (5).

[0066] Reference Figure 5, the motor overcurrent protection circuit (9) comprises a comparator U6C, a resistor R201, a resistor 202, a resistor R123, and a transistor Q201;

[0067] The reverse input terminal of the comparator U6C is connected to a reference voltage, and the forward input terminal is connected to the current of the motor (5); the output terminal of the comparator is connected to the resistor R201 and then connected to the base of the transistor Q201; the collector of the transistor Q201 is connected in series with the resistor R202 and then connected to a +5V power supply; the emitter of the transistor Q201 is grounded; one end of the resistor R123 is connected to the collector of the transistor Q201, and the other end is connected to the main control MCU (12).

[0068] Reference Figure 6 The switch tube short-circuit protection circuit (8) includes a comparator U6A, a comparator U6B, a resistor R20, a resistor R55, a resistor R56, a resistor R57, a resistor R58, and a voltage stabilizing diode D26;

[0069] The driving signal of the power switch tube (6) is connected to the cathode of the voltage stabilizing diode D26 after passing through the resistor R20, and the anode of the voltage stabilizing diode D26 is grounded; the reverse input end of the comparator U6A is connected between the resistor R20 and the voltage stabilizing diode D26; the forward input end of the comparator U6A is connected to the reference voltage; the output end of the comparator U6A is connected to the reverse input end of the comparator U6B; the forward input end of the comparator U6B is connected to the reference voltage; the output end of the comparator U6B is divided into three paths, the first path is connected to the resistor R56 and then connected to the +15V power supply, the second path is connected to the resistor R57 and then connected to the main control MCU (12), the third path is connected to the resistor R58 and then connected to the motor short-circuit protection circuit (10), one end of the resistor R55 is connected between the comparator U6B and the resistor R57, and the other end is connected to the relay control circuit (2).

[0070] Reference Figure 7 , the motor short-circuit protection circuit (10) comprises a resistor R71, a resistor R69, a resistor R73, a capacitor C68, and a comparator U6D;

[0071] One end of the resistor R69 is connected to a +5V power supply, and the other end is connected to the capacitor C68 and then grounded; the motor (5) current is connected between the resistor R69 and the capacitor C68 after passing through the resistor R71, and then connected to the reverse input end of the comparator U6D; the reference voltage is connected to the positive input end of the comparator U6D; the output end of the comparator U6D is divided into three paths, the first path is connected to the resistor R73 and then connected to a +15V power supply, the second path is connected to the resistor R58 of the switch tube short-circuit protection circuit (8), and the third path is connected to the drive and motor current limiting detection control circuit (11).

[0072] Reference Figure 8 The driving and motor current limiting detection control circuit (11) includes a comparator U9A, a comparator U9B, a comparator U9C, a comparator U9D, a capacitor C62, a capacitor C63, a capacitor C65, and a resistor R72;

[0073] The current of the motor (5) is input to the positive input terminal of the comparator U9B, and the reference voltage is input to the negative input terminal. One end of the capacitor C63 is grounded, and the other end is connected to the negative input terminal of the comparator U9B. The output end of the comparator U9B is connected to the negative input terminal of the comparator U9A. The reference voltage is input to the positive input terminal of the comparator U9A. The positive electrode of the comparator is connected to a +15V power supply, and the negative electrode is grounded. The output end of the comparator U9A is divided into two paths, one path is connected to the positive input terminal of the comparator U9D, and the other path is connected to the output end of the comparator U6D in the motor short-circuit protection circuit (10). One end of the capacitor C62 is grounded, and the other end is connected to the positive input terminal of the comparator U9A. The capacitor C65 is connected between the negative electrode and the output terminal of the comparator U9A.

[0074] The reference voltage is input to the positive input terminal of the comparator U9C, and the reverse input terminal is connected in series with the resistor R72 and connected to the main control MCU PWM I / O interface; the output terminal of the comparator U9C is connected to the positive input terminal of the comparator U9D, and the reference voltage is input to the reverse input terminal of the comparator U9D; the output terminal of the comparator U9D is connected to the gate of the power switch tube.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-protection treadmill motor controller, characterized in that: include: Motor speed control unit, power supply, main control MCU and motor protection unit; among which: The motor speed regulating unit includes an AC input circuit, a relay control circuit, a power frequency rectifier circuit, a filter circuit, a motor, a power switch tube, and a current detection resistor. The motor speed regulating unit is used to power the motor and adjust the working state of the motor according to the software command of the main control MCU and the hardware feedback of the motor protection unit; The power supply includes an AC-DC switching power supply and an auxiliary power supply, which provides power to the controller function module on the one hand and provides the necessary power requirements for the host computer on the other hand; The main control MCU, on the one hand, receives information reported by the motor protection unit from the host computer, and on the other hand, regulates the motor according to the information reported by the motor protection unit; The motor protection unit is used to monitor the motor speed regulating unit, take corresponding protection measures when an abnormality is detected in the motor speed regulating unit, and report the monitoring result to the main control MCU.

2. A multi-protection treadmill motor controller as claimed in claim 1, characterized in that: The motor protection unit includes at least one group of a controller overcurrent and current limiting protection unit, a controller power switch tube short-circuit protection unit, and a controller motor short-circuit protection unit.

3. A multi-protection treadmill motor controller as claimed in claim 2, characterized in that: The output end of the AC input circuit is connected to the AC-DC switching power supply and the auxiliary power supply in sequence, and then connected to the main control MCU.

4. A multi-protection treadmill motor controller as claimed in claim 3, characterized in that: The controller overcurrent and current limiting protection unit is used to monitor the working current of the motor, take protective measures when the motor current is too high, and transmit the monitoring results to the main control MCU; The controller power switch tube short-circuit protection unit is used to monitor the state of the power switch tube in the motor speed control unit, take protection measures when the power switch tube is short-circuited, and transmit the monitoring result to the main control MCU; The controller motor short-circuit protection unit is used to monitor the motor state, take protective measures when the motor is short-circuited, and transmit the monitoring results to the main control MCU.

5. A multi-protection treadmill motor controller according to any one of claims 1 to 4, characterized in that: The motor speed regulation unit comprises an AC input circuit, a relay control circuit, an industrial frequency rectification circuit (3), a filter circuit, a motor, a power switch tube, and a current detection resistor (7) which are connected in sequence; one end of the current detection resistor is connected to the motor speed regulation unit, and the other end is grounded; the drain of the power switch tube is connected to the motor, the source is connected to one end of the current detection resistor, and the gate is connected to the drive and motor current limiting detection control unit; the output end of the main control MCU is signal-connected to the input end of the relay control circuit.

6. A multi-protection treadmill motor controller as claimed in claim 5, characterized in that: The controller overcurrent and current limiting protection unit includes a motor overcurrent protection circuit and a drive and motor current limiting detection control circuit; the input end of the motor overcurrent protection circuit is connected to the source of the power switch tube, and the output end is connected to the input end of the main control MCU; The drive and motor current limiting detection control circuit drives and controls the gate of the power switch tube on the one hand, and collects the source signal of the power switch tube on the other hand. The drive and motor current limiting detection control circuit is connected to the main control MCU by bidirectional signals.

7. A multi-protection treadmill motor controller as claimed in claim 5, characterized in that: The controller power switch tube short-circuit protection unit includes a switch tube short-circuit protection circuit and a drive and motor current limiting detection control circuit; the input end of the switch tube short-circuit protection circuit is connected between the motor and the power switch tube, and the output end is divided into two paths, one is connected to the input end of the main control MCU, and the other is connected to the relay control circuit signal; the drive and motor current limiting detection control circuit drives and controls the gate of the power switch tube, and the drive and motor current limiting detection control circuit is connected to the main control MCU in a bidirectional signal manner.

8. A multi-protection treadmill motor controller as claimed in claim 5, characterized in that: The controller motor short-circuit protection unit includes a switch tube short-circuit protection circuit, a motor short-circuit protection circuit and a drive and motor current limiting detection control circuit; the input end of the motor short-circuit protection circuit is connected between the current detection resistor and the power switch tube, and the output end is divided into two paths, one is connected to the input end of the drive and motor current limiting detection control circuit, and the other is connected to the input end of the switch tube short-circuit protection circuit; the output end of the switch tube short-circuit protection circuit is divided into two paths, one is connected to the input end of the main control MCU, and the other is connected to the relay control circuit signal; the drive and motor current limiting detection control circuit drives and controls the gate of the power switch tube, and the drive and motor current limiting detection control circuit is connected to the main control MCU in a bidirectional signal manner.

9. A multi-protection treadmill motor controller as claimed in claim 6, characterized in that: The motor overcurrent protection circuit includes a comparator U6C, a resistor R201, a resistor 202, a resistor R123, and a transistor Q201; The reverse input terminal of the comparator U6C is connected to the reference voltage, and the positive input terminal is connected to the current of the motor; the output terminal of the comparator is connected to the resistor R201 and then connected to the base of the transistor Q201, the collector of the transistor Q201 is connected in series with the resistor R202 and then connected to the +5V power supply, and the emitter of the transistor Q201 is grounded; one end of the resistor R123 is connected to the collector of the transistor Q201, and the other end is connected to the main control MCU.

10. A multi-protection treadmill motor controller as claimed in claim 7, characterized in that: The switch tube short circuit protection circuit includes a comparator U6A, a comparator U6B, a resistor R20, a resistor R55, a resistor R56, a resistor R57, a resistor R58, and a voltage stabilizing diode D26; The power switch tube driving signal is connected to the cathode of the voltage stabilizing diode D26 after passing through the resistor R20, and the anode of the voltage stabilizing diode D26 is grounded; the reverse input end of the comparator U6A is connected between the resistor R20 and the voltage stabilizing diode D26; the forward input end of the comparator U6A is connected to the reference voltage; the output end of the comparator U6A is connected to the reverse input end of the comparator U6B; the forward input end of the comparator U6B is connected to the reference voltage; the output end of the comparator U6B is divided into three paths, the first path is connected to the resistor R56 and then connected to the +15V power supply, the second path is connected to the resistor R57 and then connected to the main control MCU, the third path is connected to the resistor R58 and then connected to the motor short-circuit protection circuit, one end of the resistor R55 is connected between the comparator U6B and the resistor R57, and the other end is connected to the relay control circuit.

11. A multi-protection treadmill motor controller as claimed in claim 8, characterized in that: The motor short circuit protection circuit includes a resistor R71, a resistor R69, a resistor R73, a capacitor C68, and a comparator U6D; One end of the resistor R69 is connected to a +5V power supply, and the other end is connected to the capacitor C68 and then grounded; the motor current is connected between the resistor R69 and the capacitor C68 after passing through the resistor R71, and then connected to the reverse input end of the comparator U6D; the reference voltage is connected to the positive input end of the comparator U6D; the output end of the comparator U6D is divided into three paths, the first path is connected to the resistor R73 and then connected to a +15V power supply, the second path is connected to the resistor R58 of the switch tube short-circuit protection circuit, and the third path is connected to the drive and motor current limiting detection control circuit.

12. A multi-protection treadmill motor controller according to any one of claims 6 to 11, characterized in that: The drive and motor current limiting detection control circuit includes comparator U9A, comparator U9B, comparator U9C, comparator U9D, capacitor C62, capacitor C63, capacitor C65, and resistor R72; The current of the motor is input to the positive input terminal of the comparator U9B, and the reference voltage is input to the negative input terminal. One end of the capacitor C63 is grounded, and the other end is connected to the negative input terminal of the comparator U9B. The output end of the comparator U9B is connected to the negative input terminal of the comparator U9A. The reference voltage is input to the positive input terminal of the comparator U9A. The positive electrode of the comparator is connected to the +15V power supply, and the negative electrode is grounded; the output end of the comparator U9A is divided into two paths, one path is connected to the positive input terminal of the comparator U9D, and the other path is connected to the output end of the comparator U6D in the motor short-circuit protection circuit; one end of the capacitor C62 is grounded, and the other end is connected to the positive input terminal of the comparator U9A; the capacitor C65 is connected across the negative electrode and the output terminal of the comparator U9A; The reference voltage is input to the positive input terminal of the comparator U9C, and the reverse input terminal is connected in series with the resistor R72 and connected to the main control MCU PWM I / O interface; the output terminal of the comparator U9C is connected to the positive input terminal of the comparator U9D, and the reference voltage is input to the reverse input terminal of the comparator U9D; the output terminal of the comparator U9D is connected to the gate of the power switch tube.

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