What is the relationship between torque and speed of a stepper motor? There is a certain relationship between the torque and speed of a stepper motor.
What is the relationship between torque and speed of a stepper motor?
Generally, when the speed is lower, the torque of the stepper motor is higher; And when the speed increases, the torque gradually decreases. This phenomenon is called the torque-speed curve.
The torque-speed curve can be divided into two parts:
1. Static torque: When the stepper motor is in a stationary state, the maximum torque it can produce is called static torque. The static torque mainly depends on the rated current of the motor and the coil resistance. 
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2. Dynamic torque: When the stepper motor is running, the torque it can produce will decrease with the increase of speed. This part of the torque is affected by the motor inductance, voltage and drive circuitry. The dynamic torque decreases with increasing speed, which leads to stepper motors that may lose step when operating at high speeds.
To sum up, the relationship between torque and speed of a stepper motor can be expressed by a torque-velocity curve. At low speeds, stepper motors have higher torque, while at high speeds, torque gradually decreases. In order to avoid step loss, it is necessary to reasonably select stepper motor parameters and drive settings according to application scenarios and load requirements. In some cases, a closed-loop control system can be employed to improve the stability and performance of the system.
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What is the relationship between static torque and speed of a stepper motor?
There is an inverse proportional relationship between the static torque and speed of a stepper motor. That is, the greater the static torque of the stepper motor, the smaller its speed; Conversely, the smaller the static torque, the greater the speed.
This is because when the stepper motor is at rest, the maximum torque it produces is called static torque, which mainly depends on the rated current of the motor and the coil resistance.
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The speed is determined by the power of the motor, that is, the kinetic energy of the object. Therefore, when the power is constant, if the static torque is increased, the speed of the stepper motor will be reduced; If the static torque is reduced, the speed of the stepper motor is increased.
What is the relationship between dynamic torque and speed of a stepper motor?
There is a proportional relationship between the dynamic torque and speed of a stepper motor.
That is, the greater the dynamic torque of the stepper motor, the faster its speed; Conversely, the smaller the dynamic torque, the slower the speed.
What is the relationship between torque and speed of a stepper motor
This is because when the stepper motor is in a dynamic state, its torque mainly depends on the instantaneous current and load resistance of the motor.
When the instantaneous current is constant, if the load resistance is increased, the dynamic torque of the stepper motor will increase, and the speed will increase accordingly; If the load resistance is reduced, the dynamic torque of the stepper motor is reduced and the speed is reduced accordingly.
Is the holding torque a static torque?
The holding torque is the static torque.
The holding torque generally refers to the tension of the rotor cogging on the stator magnetic field when the motor is static, so it is also called static torque.
Dynamic torque refers to the tension of the rotor cogging on the stator magnetic field during the operation of the motor. Therefore, the holding moment and the dynamic moment are two different torques and should not be confused.
What is the difference between dynamic and static torque?
The difference between dynamic and static moments is as follows:
1. Static torque: Static torque refers to the torque of the motor in a stationary state. It does not change with speed and is the initial moment for the motor to start.
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2. Dynamic torque: Dynamic torque refers to the torque of the motor during operation. It varies with speed and is the actual torque of the motor under load.
In general, the static torque is the initial torque of the motor, while the dynamic torque is the actual torque of the motor during operation.