A DC motor feedback speed regulating system with analog quantity detection control

Abstract

The application provides a DC motor feedback speed regulation system of analog quantity detection control and belongs to the technical field of motor control. The application comprises a base, a variable voltage power supply arranged on the base and used for providing power supply for the DC motor feedback speed regulation system, and an upper plate arranged above the base; a control execution module used for controlling the operation of a DC motor MA, a rotating disc, the DC motor MA used for driving the rotating disc to rotate, and a generator MF rotationally connected with the DC motor MA are arranged on the upper plate; three groups of load inertia adjusting devices with the same structure and a laser speed measuring instrument with a speed measuring reflective sticker are arranged on the rotating disc. The application can experiment the knowledge of classical control theory, and can also actively change the rotational inertia of the load, so as to facilitate the research on the tracking effect of the DC motor feedback speed regulation when the rotational inertia is changed.

Description

Technical Field

[0001] This invention relates to the field of electric motor control technology, and in particular to a DC motor feedback speed regulation system based on analog signal detection and control. This system allows for the experimental application of classical control theory in motor control technology, enabling direct observation of the tracking effect of DC motor feedback speed regulation when the moment of inertia changes. Background Technology

[0002] The most common form of speed control for DC motors is PWM speed control. PWM speed control generally adjusts the motor speed by actively increasing the duty cycle, while using a Hall sensor to measure the motor speed. However, this speed does not participate in the system control process in the form of voltage feedback; instead, the operator adjusts the duty cycle based on the displayed speed. There are also DC motor control systems that use a microcontroller combined with a Hall sensor. In this case, the speed is sent to the microcontroller as a digital quantity for processing. Since the Hall sensor's count is a digital quantity, this feedback control system belongs to discrete control systems, not continuous control systems. The research methods for discrete control systems and continuous control systems differ significantly. The research methods and theories of continuous control systems in classical control theory occupy an important position in control engineering. Only DC motor speed control systems using analog quantity control are the most suitable research objects in understanding the concept of feedback, applying the Routh criterion, and even learning system correction. It plays an irreplaceable role in combining theoretical knowledge with practice. Therefore, there is an urgent need to develop a DC motor feedback speed control system that uses analog quantity detection and control. Summary of the Invention

[0003] In view of this, in order to overcome the shortcomings of the above-mentioned background technology, the present invention provides a DC motor feedback speed regulation system with analog quantity detection and control, which can experimentally apply the knowledge of classical control theory and directly observe the tracking effect of DC motor feedback speed regulation when the moment of inertia changes.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A DC motor feedback speed control system based on analog signal detection and control, comprising:

[0006] The base has a transformer power supply on it for providing power to the DC motor MA feedback speed control system, an upper plate on it, and a laser velocimeter fixed on its side.

[0007] The upper plate is equipped with a control execution module for controlling the operation of a DC motor MA, a turntable, a DC motor MA for driving the turntable to rotate, and a generator MF rotatably connected to the DC motor MA;

[0008] The turntable is equipped with three sets of load inertia adjustment devices with the same structure, and the turntable is equipped with a speed measuring reflector. The laser speed meter is facing the speed measuring reflector.

[0009] The turntable is provided with a turntable hole and a turntable T-shaped groove. There are three turntable T-shaped grooves distributed in the circumferential direction of the turntable, and the included angle between the center lines of two adjacent turntable T-shaped grooves is 120 degrees.

[0010] The load inertia adjustment device includes a T-shaped floor disposed within the T-slot of the turntable;

[0011] The T-shaped floor is equipped with bearings, bearing seats, pressure plates, guide rods, inertia regulating motors, batteries, signal receivers, and load motion controllers.

[0012] The shaft extension end of the inertia regulating motor is connected to one shaft extension end of the screw via a coupling, and the other shaft extension end of the screw passes through and is screwed to the load mass block and then connected to the bearing;

[0013] The battery is electrically connected to the signal receiver, the inertia regulating motor and the load motion controller respectively. The signal receiver receives the signal emitted by the signal transmitter and transmits the signal to the load motion controller to control the movement of the inertia regulating motor.

[0014] The load mass block has a groove, the guide rod is fixed to the T-shaped floor, and the guide rod has a protrusion that is slidably connected to the groove.

[0015] The control execution module includes one control module power output terminal, six resistors, one adjustable resistor, one Darlington transistor, three operational amplifiers, a DC motor (MA), and a generator (MF). The control module power output terminal P1 has four terminals: P1 outputs +15V, P1 outputs -15V, P1 outputs +5V, and P1 outputs GND. P1 output is electrically connected to the VCC+ terminal (port 7) of operational amplifiers U1 and U2, and P1 output is electrically connected to port 4 of operational amplifier U1. The 4th port of U2 and the VCC- terminal of the 4th port of U3 are connected to the 3rd port of P1, which is electrically connected to the VCC+ terminal of the 7th port of U3. One end of the adjustable resistor RJ, the collector of the Darlington transistor T1, the GND terminal of the 4th port of P1 are electrically connected to the negative terminal of the DC motor MA (i.e., its GND terminal), the negative terminal of the generator MF (i.e., its GND terminal), the other end of the adjustable resistor RJ, the IN+ terminal of the 3rd port of operational amplifiers U1 and U2, the voltage division value of the adjustable resistor RJ is input to the IN+ terminal of the 3rd port of U3, and the other end of the resistor R5 is electrically connected to the IN- terminal of the 2nd port of U3 and the resistor R5. One end of R6, after being processed by operational amplifier U3, outputs at port 6 (OUT) of U3. Port 6 (OUT) of U3 is electrically connected to the other end of resistor R6 and the base of Darlington transistor T1. The emitter of Darlington transistor T1 is electrically connected to the positive terminal (VCC) of DC motor MA. DC motor MA drives generator MF. The positive terminal (VCX) of generator MF is electrically connected to one end of resistor R1. The other end of resistor R1 is electrically connected to port 2 (IN-) of operational amplifier U1 and one end of resistor R2. After processing by operational amplifier U1... The output is at the OUT terminal of port 6 of U1. The OUT terminal of port 6 of U1 is electrically connected to the other end of resistor R2 and one end of resistor R3. The other end of resistor R3 is electrically connected to the IN- terminal of port 2 of operational amplifier U2 and one end of resistor R4. After the operation is performed by operational amplifier U2, the output is at the OUT terminal of port 6 of U2. The OUT terminal of port 6 of U2 is connected to the other end of resistor R4 and one end of resistor R5. The other end of resistor R5, i.e. the right end, is electrically connected to the IN- terminal of port 2 of operational amplifier U3, thus constructing a complete control execution module circuit.

[0016] A fan is installed on the upper plate;

[0017] A pressure plate is provided on the upper plate, and the DC motor MA and the generator MF are disposed between the pressure plate;

[0018] The DC motor MA and the generator MF are mounted between V-grooves in the pressure plates above and below them.

[0019] Preferably, the base is connected to the upper plate via a base screw.

[0020] Preferably, the DC motor MA is connected to the turntable hole via a square key.

[0021] Preferably, the DC motor MA is connected to the generator MF via a coupling.

[0022] Preferably, the transformer power supply is used to provide voltages of +15V, -15V, GND, and +5V.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The analog signal detection and control DC motor feedback speed regulation system provided by this invention has two main aspects: First, it provides a method and device for analog signal control of motor speed regulation, which provides a reference for developing similar systems for other DC motors; second, the device can conduct experiments based on the knowledge of classical control theory, and can directly observe the tracking effect of DC motor feedback speed regulation when the moment of inertia changes. Attached Figure Description

[0025] Figure 1 This is a front view of the present invention;

[0026] Figure 2 This is a top view of the present invention;

[0027] Figure 3 yes Figure 1 Sectional view of AA;

[0028] Figure 4 yes Figure 1 BB section view;

[0029] Figure 5 yes Figure 1 Enlarged view at point C;

[0030] Figure 6 yes Figure 4 DD section view;

[0031] Figure 7 yes Figure 4 Enlarged view at point E in the middle;

[0032] Figure 8 This is the circuit diagram of the control execution module.

[0033] Appendix Number

[0034] 1. Base, 2. Transformer, 3. Upper plate, 4. Fan, 5. First pressure plate, 6. Second pressure plate, 7. Load inertia adjustment device, 8. Control execution module, 9. Turntable, 10. Square key, 11. Base screw one, 12. Base screw two, 13. Base screw three, 14. Base screw four, 15. Third pressure plate, 16. Fourth pressure plate, 17. First pressure plate bolt one, 18. First pressure plate bolt two, 19. Coupling two, 20. Fourth pressure plate adjusting bolt, 21. Laser velocimeter, 22. Upper plate threaded hole, 23. Guide rod rectangular protrusion Starting from the first, 24. Signal transmitter, 501. First pressure plate V-groove, 601. Second pressure plate V-groove, 701. Bearing seat one, 702. Bearing one, 703. Screw, 704. Load mass block, 705. Coupling one, 706. Inertia regulating motor, 707. Battery, 708. Signal receiver, 709. Load motion controller, 710. Bearing seat two, 711. Bearing two, 712. T-shaped floor, 713. Fifth pressure plate, 714. Guide rod, 901. Turntable hole, 902. Turntable T-groove, 903. Speed ​​measuring reflector. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] like Figures 1-8 As shown, the present invention provides a DC motor feedback speed control system based on analog signal detection and control, comprising:

[0039] The base 1 is equipped with a transformer power supply 2 for providing power to the DC motor MA feedback speed control system, and an upper plate 3 is provided above it, with a laser velocimeter 21 fixed on its side.

[0040] The upper plate 3 is provided with a control execution module 8 for controlling the operation of the DC motor MA, a turntable 9, a DC motor MA for driving the turntable 9 to rotate, and a generator MF rotatably connected to the DC motor MA;

[0041] The turntable 9 is equipped with three sets of load inertia adjustment devices 7 with the same structure. The turntable 9 is equipped with a speed measuring reflective sticker 903. The laser velocimeter 21 is directly facing the speed measuring reflective sticker 903.

[0042] The turntable 9 is provided with a turntable hole 901 and a turntable T-shaped groove 902. There are three turntable T-shaped grooves 902 distributed in the circumferential direction of the turntable 9, and the included angle between the center lines of two adjacent turntable T-shaped grooves 902 is 120 degrees.

[0043] The load inertia adjustment device 7 includes a T-shaped floor 712 disposed in the turntable T-slot 902;

[0044] The T-shaped floor 712 is equipped with bearings, bearing seats, pressure plates, guide rods 714, inertia adjustment motors 706, batteries 707, signal receivers 708, and load motion controllers 709.

[0045] The shaft extension end of the inertia regulating motor 706 is connected to one shaft extension end of the screw 703 via a coupling 705, and the other shaft extension end of the screw 703 passes through and is screwed onto the load mass block 704 and then connected to the bearing.

[0046] The battery 707 is electrically connected to the signal receiver 708, the inertia regulating motor 706 and the load motion controller 709 respectively. The signal receiver 708 receives the signal emitted by the signal transmitter 24 and transmits the signal to the load motion controller 709 to control the movement of the inertia regulating motor 706.

[0047] The load mass block 704 has a groove, the guide rod 714 is fixed on the T-shaped floor 712, and the guide rod 714 has a protrusion that is slidably connected to the groove of the load mass block 704.

[0048] The control execution module includes one control module power output terminal, six resistors, one adjustable resistor, one Darlington transistor, three operational amplifiers, a DC motor (MA), and a generator (MF). The control module power output terminal P1 has four terminals: P1 outputs +15V, P1 outputs -15V, P1 outputs +5V, and P1 outputs GND. P1 output is electrically connected to the VCC+ terminal (port 7) of operational amplifiers U1 and U2, and P1 output is electrically connected to port 4 of operational amplifier U1. The 4th port of U2 and the VCC- terminal of the 4th port of U3 are connected to the 3rd port of P1, which is electrically connected to the VCC+ terminal of the 7th port of U3. One end of the adjustable resistor RJ, the collector of the Darlington transistor T1, the GND terminal of the 4th port of P1 are electrically connected to the negative terminal of the DC motor MA (i.e., its GND terminal), the negative terminal of the generator MF (i.e., its GND terminal), the other end of the adjustable resistor RJ, the IN+ terminal of the 3rd port of operational amplifiers U1 and U2, the voltage division value of the adjustable resistor RJ is input to the IN+ terminal of the 3rd port of U3, and the other end of the resistor R5 is electrically connected to the IN- terminal of the 2nd port of U3 and the resistor R5. One end of R6, after being processed by operational amplifier U3, outputs at port 6 (OUT) of U3. Port 6 (OUT) of U3 is electrically connected to the other end of resistor R6 and the base of Darlington transistor T1. The emitter of Darlington transistor T1 is electrically connected to the positive terminal (VCC) of DC motor MA. DC motor MA drives generator MF. The positive terminal (VCX) of generator MF is electrically connected to one end of resistor R1. The other end of resistor R1 is electrically connected to port 2 (IN-) of operational amplifier U1 and one end of resistor R2. After processing by operational amplifier U1... The output is at the OUT terminal of port 6 of U1. The OUT terminal of port 6 of U1 is electrically connected to the other end of resistor R2 and one end of resistor R3. The other end of resistor R3 is electrically connected to the IN- terminal of port 2 of operational amplifier U2 and one end of resistor R4. After the operation is performed by operational amplifier U2, the output is at the OUT terminal of port 6 of U2. The OUT terminal of port 6 of U2 is connected to the other end of resistor R4 and one end of resistor R5. The other end of resistor R5, i.e. the right end, is electrically connected to the IN- terminal of port 2 of operational amplifier U3, thus constructing a complete control execution module circuit.

[0049] A fan 4 is provided on the upper plate 3;

[0050] A pressure plate is provided on the upper plate 3, and the DC motor MA and the generator MF are disposed between the pressure plate;

[0051] The DC motor MA and the generator MF are mounted between V-grooves in the pressure plates above and below them.

[0052] In this invention, the DC motor MA is connected to the turntable hole 901 via a square key 10.

[0053] In this invention, the DC motor MA is connected to the generator MF via a coupling.

[0054] In this invention, the base 1 is connected to the upper plate 3 via a base screw.

[0055] In this invention, the base 1 and the upper plate 3 are preferably fixedly connected by base screw 11, base screw 2 12, base screw 3 13, base screw 4 14 and nuts;

[0056] The control execution module 8 is preferably fixed to the upper plate 3 by bolts.

[0057] In this invention, the fan 4 is preferably fixed to the upper plate 3 by bolts.

[0058] In this invention, the pressure plates are preferably a first pressure plate 5, a second pressure plate 6, a third pressure plate 15, and a fourth pressure plate 16; the first pressure plate 5 and the second pressure plate 6 are arranged vertically, and the third pressure plate 15 and the fourth pressure plate 16 are also arranged vertically. The first pressure plate 5 and the second pressure plate 6 are respectively provided with a first pressure plate V-groove 501 and a second pressure plate V-groove 601. The DC motor MA is preferably sandwiched between the first pressure plate V-groove 501 and the second pressure plate V-groove 601. The third pressure plate 15 and the fourth pressure plate 16 are respectively provided with a first pressure plate V-groove 501 and a second pressure plate V-groove 601. The generator MF is preferably clamped between the V-groove of the third pressure plate and the V-groove of the fourth pressure plate. The pressure plates are preferably connected to the upper plate by bolts, such as: the first pressure plate 5 is connected to the upper plate 3 by the first pressure plate bolt 17 and the first pressure plate bolt 28; the fourth pressure plate 16 is connected by the fourth pressure plate adjusting bolt 20 passing through the threaded hole on the upper plate 3, etc. As for other pressure plate connections, the connection method can be selected according to actual needs, and no special requirements are made for this.

[0059] In this invention, the bearing housing preferably includes bearing housing 701, bearing housing 710, bearing 702 and bearing 711, all of which are disposed on the T-shaped floor 712, wherein the pressure plate on the T-shaped floor is the fifth pressure plate 713.

[0060] In this invention, there are three identical load inertia adjustment devices 7 on the turntable 9. They are distributed circumferentially along the turntable 9, and adjacent load inertia adjustment devices form a 120-degree angle. The T-shaped base plate 712 of the load inertia adjustment device 7 is installed in the turntable T-groove 902 of the turntable 9 and is fixedly connected by bolts. Bearing seat 701, bearing 702, and fifth pressure plate 713 are all fixed on the T-shaped base plate 712. The left end of the screw 703 is inserted into bearing 702, and bearing 702 is installed on bearing seat 702. In section 1, screw 703 passes through the internal thread of load mass block 704 and through bearing 702. The shaft extension end of screw 703 is connected to the shaft extension end of inertia regulating motor 706 through coupling 705. Bearing 711 is installed in bearing housing 710. Battery 707, signal receiver 708, and load motion controller 709 are all fixed on T-shaped floor 712. Battery 707, signal receiver 708, inertia regulating motor 706 and load motion controller 709 are electrically connected.

[0061] In this invention, the load mass block 704 has a rectangular slot, and the guide rod 714 has a rectangular protrusion 23 that passes through the rectangular slot of the load mass block 704 so that the load mass block 704 can only move along the guide rod 714.

[0062] In this invention, the DC motor MA is connected to the generator MF via a coupling, preferably via a second coupling 19. That is, one shaft extension of the DC motor MA is connected to one shaft extension of the generator MF via the second coupling 19, and the two rotate at the same speed. The other shaft extension of the DC motor MA and the key 10 are inserted into the turntable hole 901 of the turntable 9, so that the turntable 9 rotates with the DC motor MA.

[0063] In this invention, the DC motor MA is a permanent magnet brushed DC motor.

[0064] The working principle of this invention is as follows:

[0065] like Figures 1 to 8As shown, a DC motor feedback speed control system based on analog signal detection and control operates as follows: When the power cord of transformer 2 is plugged in, fan 18 starts working, cooling the electronic components on control execution module 8. Manually adjusting the resistance value of adjustable resistor RJ on control module 8 changes the voltage value input to port 3 (IN+) of operational amplifier U3. This changes the desired speed of the DC motor feedback speed control system. The voltage VCX fed back from generator MF passes through resistors R1 and R2, operational amplifier U1, resistors R3 and R4, operational amplifier U2, and resistor R5, and the resulting output enters port 2 (IN-) of operational amplifier U3, generating a voltage deviation. This deviation is amplified by Darlington transistor T1, increasing the power supply to DC motor MA. The electrical input power increases the rotational speed, gradually reaching the desired speed. When observing whether the system can track speed regulation when the load's moment of inertia changes, the signal transmitter 24 should first transmit the load mass block motion control signal. The three signal receivers 708 receive the signal and transmit it to the corresponding load motion controller 709. The controller 709 supplies power to the inertia adjustment motor 706, driving the screw 703 to move, causing the load mass block 704 to move along the guide rod 714 on the screw 703. When the signal receivers 708 are turned off, the load mass block 704 moves into place. The laser velocimeter 21 illuminates the white reflective sticker 903 on the turntable 9 and displays the rotational speed on the laser velocimeter 21, thus revealing the system's tracking effect on rotational speed when the load's moment of inertia changes.

[0066] The above are merely preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A DC motor feedback speed control system with analog quantity detection control, characterized in that, include: The base has a transformer power supply on it for providing power to the DC motor MA feedback speed control system, an upper plate on it, and a laser velocimeter fixed on its side. The upper plate is equipped with a control execution module for controlling the operation of a DC motor MA, a turntable, a DC motor MA for driving the turntable to rotate, and a generator MF rotatably connected to the DC motor MA; The turntable is equipped with three sets of load inertia adjustment devices with the same structure, and the turntable is equipped with a speed measuring reflector. The laser speed meter is facing the speed measuring reflector. The turntable is provided with a turntable hole and a turntable T-shaped groove. There are three turntable T-shaped grooves distributed in the circumferential direction of the turntable, and the included angle between the center lines of two adjacent turntable T-shaped grooves is 120 degrees. The load inertia adjustment device includes a T-shaped floor set in the T-slot of the turntable; The T-shaped floor is equipped with bearings, bearing seats, pressure plates, guide rods, inertia regulating motors, batteries, signal receivers, and load motion controllers. The shaft extension end of the inertia regulating motor is connected to one shaft extension end of the screw via a coupling, and the other shaft extension end of the screw passes through and is screwed onto the load mass block before being connected to the bearing; The battery is electrically connected to the signal receiver, the inertia regulating motor and the load motion controller respectively. The signal receiver receives the signal emitted by the signal transmitter and transmits the signal to the load motion controller to control the movement of the inertia regulating motor. The load mass block has a groove, the guide rod is fixed to the T-shaped floor, and the guide rod has a protrusion that is slidably connected to the groove. The control execution module includes one control module power output terminal, six resistors, one adjustable resistor, one Darlington transistor, three operational amplifiers, a DC motor (MA), and a generator (MF). The control module power output terminal P1 has four terminals: P1 outputs +15V, P1 outputs -15V, P1 outputs +5V, and P1 outputs GND. P1 output is electrically connected to the VCC+ terminal (port 7) of operational amplifiers U1 and U2, and P1 output is electrically connected to port 4 of operational amplifier U1. The fourth port of U2 and the fourth port of U3 (VCC-) are connected to the VCC- terminal. The third port of P1 is connected to the VCC+ terminal of the seventh port of U3. One end of the adjustable resistor RJ is electrically connected to the collector of the Darlington transistor T1. The GND terminal of the fourth port of P1 is electrically connected to the negative terminal (GND terminal) of the DC motor MA and the negative terminal (GND terminal) of the generator MF. The other end of the adjustable resistor RJ is connected to the IN+ terminal of the third port of operational amplifiers U1 and U2. The voltage division value of the adjustable resistor RJ is input to the IN+ terminal of the third port of U3. The other end of the resistor R5 is electrically connected to the IN- terminal of the second port of U3. One end of resistor R6, after being processed by operational amplifier U3, is output at port 6 (OUT). Port 6 (OUT) of U3 is electrically connected to the other end of resistor R6 and the base of Darlington transistor T1. The emitter of Darlington transistor T1 is electrically connected to the positive terminal VCC of DC motor MA. DC motor MA drives generator MF. The positive terminal VCX of generator MF is electrically connected to one end of resistor R1. The other end of resistor R1 is electrically connected to port 2 (IN-) of operational amplifier U1 and one end of resistor R2. After processing by operational amplifier U1... The output is at the OUT terminal of port 6 of U1. The OUT terminal of port 6 of U1 is electrically connected to the other end of resistor R2 and one end of resistor R3. The other end of resistor R3 is electrically connected to the IN- terminal of port 2 of operational amplifier U2 and one end of resistor R4. After the operation is performed by operational amplifier U2, the output is at the OUT terminal of port 6 of U2. The OUT terminal of port 6 of U2 is connected to the other end of resistor R4 and one end of resistor R5. The other end of resistor R5, i.e. the right end, is electrically connected to the IN- terminal of port 2 of operational amplifier U3, thus constructing a complete control execution module circuit. A fan is installed on the upper plate; A pressure plate is provided on the upper plate, and the DC motor MA and the generator MF are disposed between the pressure plate; The DC motor MA and the generator MF are mounted between V-grooves in the pressure plates above and below them.

2. A DC motor feedback speed regulating system with analog detection control according to claim 1, characterized in that, The base is connected to the upper plate via base screws.

3. A DC motor feedback speed regulating system with analog detection control according to claim 1, characterized in that, The DC motor MA is connected to the turntable hole via a square key.

4. A DC motor feedback speed regulating system with analog detection control according to claim 1, characterized in that, The DC motor MA is connected to the generator MF via a coupling.

5. A DC motor feedback speed regulating system with analog detection control according to any one of claims 1-4, characterized in that, The transformer power supply is used to provide voltages of +15V, -15V, GND, and +5V.

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