How to make a motor governor and how to regulate the speed of the motor?

If a potentiometer is used: 1. The power of the potentiometer should be large enough. 2. The resistance value should be appropriate.

The magnitude of the resistance depends on the current of the fan. According to the existing DC law, it can be successfully made. When I was making a model ship, I once made a landlord's governor.

At that time, the potentiometer was 20 ohms and 10 watts, driving a 380 motor. It's okay when idling on land, but when it's in the water, after two minutes, the potentiometer burns. In the end, it can only be used as a switch.

I recommend using a potentiometer above 100 ohm and 5 watts. The earliest model governor was an adjustable potentiometer. But the connection goes like this:

The two ends of the potentiometer are connected to the positive and negative poles of the battery, the middle sliding arm is connected to one foot of the motor, and the other foot of the motor is connected to one pole of the battery. Now it's all electronic governors, although a bit expensive, but the effect is good, and it saves power.

It is OK to connect the potentiometer directly, the potentiometer generally has three pins, either in the middle and next to it.

DC or AC? How much power? If you don't need it, you can use the adjustable resistor.

What type of motor? Different motors have different speed regulation methods.

As shown in your first image.

The positive pole of the power supply is connected to a wire, the red wire of the regulator is connected to the positive pole of the power supply, the wire connected to the power supply is connected to the positive pole of the motor, the blue wire of the regulator is connected to the negative pole of the motor, and the black wire of the regulator is connected to the negative pole of the power supply.

The red and black are used to power the governor, so connect the positive and negative poles of the power supply. The positive pole of the battery supplies power to the positive pole of the motor, and the blue wire is connected to the negative pole of the motor.

There are multi-speed motors that change the number of stator pole pairs that change the synchronous speed, and frequency conversion speed regulation that changes the stator voltage and frequency can regulate the speed of non-commutating motors.

It is mainly divided into the following categories:

1. Pole change speed regulation

Change the wiring mode of the stator winding of the motor to change the number of pole pairs of the motor, so that the synchronous speed can be changed step by step, and the speed of the motor can be adjusted step by step.

2. Frequency conversion speed regulation

Change the frequency of the input power supply at the stator end of the asynchronous motor, and make it continuously adjustable to change its synchronous speed, and the method of realizing the speed regulation of the motor is called frequency conversion speed regulation.

3. Electromagnetic speed regulation

The method of speed regulation through electromagnetic slip clutch is called electromagnetic speed regulation.

How it works:

DC governor is a device that adjusts the speed of the DC motor, the upper end is connected to the AC power supply, the lower end is connected to the DC motor, the DC governor converts the AC power into two output DC power supplies, one input to the DC motor magnet (stator), one input to the DC motor armature), the DC governor adjusts the speed of the DC motor by controlling the armature DC voltage.

At the same time, the DC motor gives a feedback current to the governor, and the governor judges the speed of the DC motor according to the feedback current, and corrects the armature voltage output if necessary, so as to adjust the speed of the motor again.

Extended information: governor (governor): is an automatic adjustment device, which automatically increases or decreases the fuel supply of the fuel injection pump according to the change of diesel engine load, so that the diesel engine can run at a stable speed.

Speed regulators have been widely used in industrial DC motor speed regulation, industrial conveyor belt speed regulation, lighting mediation, computer power heat dissipation, DC fans, etc.

Hello answer, already seen your question. Due to the large number of inquiries, I will answer them one by one. So please be patient, don't close the order too early, and provide more valid information to give you a better answer.

Working principle: The inverter is an electric energy control device that uses the on-off effect of the power semiconductor device to convert the power frequency power supply into another frequency. The inverter we use mainly adopts AC-DC-AC mode (VVVF frequency conversion or vector control frequency conversion), which first converts the power frequency AC power supply into DC power supply through the rectifier, and then converts the DC power supply into AC power supply with controllable frequency and voltage to supply the motor.

The circuit of the inverter is generally composed of four parts: rectification, intermediate DC link, inverter and control. The rectifier part is a three-phase bridge uncontrollable rectifier, the inverter part is an IGBT three-phase bridge inverter, and the output is a PWM waveform, and the intermediate DC link is filtering, DC energy storage and buffered reactive power.

The motor can be driven by an inverter with different speeds and torques to adapt to the changing demands of the load.

The electromagnetic speed regulating asynchronous motor is composed of three parts: an ordinary squirrel cage asynchronous motor, an electromagnetic slip clutch and an electrical control device. Asynchronous Pelletizer with slip motor speed regulation.

The motor is used as a prime mover, and when it rotates, the armature of the clutch rotates together, and the electrical control device is a device that provides the excitation current of the excitation coil of the slip clutch. It consists of three parts: armature, magnetic pole and excitation coil. The armature is a cylindrical structure made of cast steel, which is connected to the rotating shaft of the squirrel cage asynchronous motor, commonly known as the active part; The magnetic pole is made into a claw-shaped structure, which is mounted on the load shaft, commonly known as the driven part.

There is no mechanical connection between the active part and the driven part. When the excitation coil passes through an electric current, a magnetic field is generated, and the claw-shaped structure forms many pairs of poles. At this time, if the armature is dragged and rotated by the squirrel cage asynchronous motor, then it will cut the magnetic field to interact and produce torque, so the magnetic pole of the driven part will rotate with the armature of the active part, and the speed of the former is lower than that of the latter, because only when the armature and the magnetic field are in relative motion, the armature can cut the magnetic field lines.

There is no essential difference between the principle of the rotation of the magnetic pole with the armature and the principle of the rotor of the ordinary asynchronous motor following the rotating magnetic field of the stator winding, the difference is: the rotating magnetic field of the asynchronous motor is generated by the three-phase alternating current in the stator winding, while the magnetic field of the electromagnetic slip clutch is generated by the direct current in the excitation coil, and plays the role of rotating the magnetic field due to the rotation of the armature.

Now electric vehicles are brushless, the principle of brushless speed regulation is through the single-chip microcomputer in the controller to detect the strength of the output model, and then the change of the signal into the drive signal of the power tube, the power tube to provide the corresponding current to the motor operation, the signal is weak to the output of the corresponding small current motor is relatively slow, on the contrary, the current of the motor will turn faster.

This question is not specific, and the speed regulation method is different for different types of motors.

AC motors have frequency conversion speed regulation, electromagnetic speed regulation, rotor string resistance speed regulation, pole change speed regulation, etc., DC motors can use series resistance speed, or direct voltage conversion speed regulation.

The main difference between cryogenic servo motors and normal motors is the temperature range in which they are designed and used. Ordinary Motors: Ordinary motors are motors that typically operate at room temperatures and are designed and manufactured with the temperature conditions of general industrial and household applications in mind.

The temperature range of these motors is typically 0??c (Celsius) to 40??c.

In this range, the performance and reliability of ordinary motors can be well guaranteed. Low-temperature motors: Low-temperature servo motors are specially designed and manufactured for use in low-temperature environments.

These motors are capable of operating in more extreme low temperature conditions and have higher cold resistance. Their temperature range is usually -40??c or lower, e.g. -60??

c。Low-temperature motors play an important role in applications such as extremely cold regions, high altitudes, refrigeration industry and scientific experiments...

The basic principle of motor speed regulation is to change the voltage or current of the motor, thereby changing the speed of the motor. Depending on the type of motor, the speed regulation method is also different.

For DC motors, the speed can be adjusted by changing the armature voltage or excitation current. For AC motors, the speed can be adjusted by changing the frequency or voltage of the power supply. Among them, frequency conversion speed regulation is a commonly used AC motor speed regulation method, which controls the speed of the motor by changing the frequency of the power supply.

The motor is connected to the three-phase power supply, and the electromagnetic clutch wiring of the motor is from the extension end of the speed regulating motor shaft, and the excitation coil (F1 F2) binding post is from right to left.

3 wires, 4 wires, and 5 wires are tachogenerator (U V W) binding posts. 7 wires (governors) on the controller aviation plug: terminals.

1-wire 2-wire is 220V input.

3 wires and 4 wires are connected to the excitation coil on the speed regulating motor.

5 wires, 6 wires, 7 wires are connected to the tachogenerator on the speed regulating motor.