Stober Antriebstechnik motor, German Stober Antriebstechnik model, Stober Antriebstechnik price

Stober Antriebstechnik motor is a commonly used AC motor. The synchronous motor is the heart of the power system; it is a component that integrates rotation and stationary parts, electromagnetic changes and mechanical motion, to realize the conversion between electrical energy and mechanical energy. Its dynamic performance is very complex, and its dynamic performance has a great impact on the dynamic performance of the entire power system. The characteristic is: during steady-state operation, there is an invariant relationship between the rotor speed and the grid frequency: n=ns=60f/p, where f is the grid frequency, p is the number of pole pairs of the motor, ns is called the synchronous speed. If the grid frequency remains unchanged, the speed of the synchronous motor is constant in steady state and independent of the load magnitude. Synchronous motors are divided into synchronous generators and synchronous motors. AC machines in modern power plants are mainly synchronous generators.

Stober Antriebstechnik motor working principle

A motor is an electric motor that converts DC electrical energy into mechanical energy. It is widely used in electric drives due to its good speed regulation performance. DC motors are divided into 3 categories according to the excitation method: permanent magnet, separately excited, and self-excited, among which self-excited is further divided into 3 types: shunt, series, and compound. When the DC power supply supplies power to the armature winding through the brushes, the conductors under the N pole on the armature surface can flow current in the same direction. According to the left-hand rule, the conductors will be subjected to a counterclockwise torque; the partial conductors under the S pole on the armature surface also flow current in the same direction, and similarly, according to the left-hand rule, the conductors will also be subjected to a counterclockwise torque. In this way, the entire armature winding, i.e., the rotor, will rotate counterclockwise, and the input DC electrical energy is converted into mechanical energy output on the rotor shaft. It consists of a stator and a rotor. Stator: base, main magnetic poles, commutating poles, brush device, etc. Rotor (armature): armature core, armature winding, commutator, shaft, fan, etc.

Stober Antriebstechnik motor control principle

Motor control principle: To make the motor rotate, the control unit must first determine the position of the motor rotor sensed by the hall-sensor, and then decide the sequence for turning on (or off) the power transistors in the inverter (inverter) according to the stator winding. The AH, BH, CH (these are called upper arm power transistors) and AL, BL, CL (these are called lower arm power transistors) in the inverter cause current to flow through the motor coils in sequence to generate a forward (or reverse) rotating magnetic field, which interacts with the rotor magnets, thereby enabling the motor to rotate clockwise or counterclockwise. When the motor rotor rotates to a position where the hall-sensor senses another set of signals, the control unit turns on the next group of power transistors. In this cycle, the motor can continue to rotate in the same direction until the control unit decides to stop the motor rotor by turning off the power transistors (or only turning on the lower arm power transistors); to reverse the motor rotor, the power transistor turn-on sequence is reversed. Basically, the switching of power transistors can be exemplified as follows: AH and BL as a group → AH and CL as a group → BH and CL as a group → BH and AL as a group → CH and AL as a group → CH and BL as a group, but never AH and AL or BH and BL or CH and CL. In addition, because electronic components always have switching response times, the response time of the components must be considered during the interleaved turn-off and turn-on times of the power transistors. Otherwise, if the lower arm (or upper arm) is turned on before the upper arm (or lower arm) is completely turned off, it will result in a short circuit between the upper and lower arms and burn out the power transistors.

Stober Antriebstechnik motor control principle

Motor control principle: First, the control unit must determine the position of the motor rotor sensed by the hall-sensor, and decide the sequence for turning on the power transistors in the inverter according to the stator winding. The AH, BH, CH (these are called upper arm power transistors) and AL, BL, CL (these are called lower arm power transistors) in the inverter cause current to flow through the motor coils in sequence to generate a forward (or reverse) rotating magnetic field, which interacts with the rotor magnets, thereby enabling the motor to rotate clockwise or counterclockwise. When the motor rotor rotates to a position where the hall-sensor senses another set of signals, the control unit turns on the next group of power transistors. In this cycle, the motor can continue to rotate in the same direction until the control unit decides to stop the motor rotor by turning off the power transistors; to reverse the motor rotor, the power transistor turn-on sequence is reversed. Basically, the switching of power transistors can be exemplified as follows: AH and BL as a group → AH and CL as a group → BH and CL as a group → BH and AL as a group → CH and AL as a group → CH and BL as a group, but never AH and AL or BH and BL or CH and CL.

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