S.A.T motor Germany S.A.T model S.A.T price

S.A.T. The motor consists of the main motor body and the driver, and is a typical mechatronic product. A brushless motor refers to a motor without brushes and commutators (or slip rings), also known as a commutator-less motor. As early as the nineteenth century when motors were born, the practical motors produced were of the brushless type, namely AC squirrel-cage asynchronous motors, which have been widely used. However, asynchronous motors have many insurmountable defects, resulting in slow development of motor technology. Transistors emerged in the mid-twentieth century, leading to the emergence of DC brushless motors that use transistor commutation circuits to replace brushes and commutators. This new type of brushless motor is called an electronically commutated DC motor, which overcomes the defects of the first generation of brushless motors.

S.A.T motor performance

Motor performance is closely related to its excitation method. Typically, there are 4 types of excitation methods for DC motors: separately excited DC motor, shunt-excited DC motor, series-excited DC motor, and compound-excited DC motor. Understand the characteristics of each of the 4 methods: 1. Separately excited DC motor: The field winding has no electrical connection with the armature; the excitation circuit is supplied by a separate DC power source. Therefore, the excitation current is not affected by the armature terminal voltage or armature current. 2. Shunt-excited DC motor: The circuit is connected in parallel for current division. The voltage across the shunt field winding is the same as the voltage across the armature. However, the field winding is wound with thin wire and has many turns, resulting in high resistance, which keeps the excitation current low. 3. Series-excited DC motor: The components are connected in series for voltage division. The field winding is connected in series with the armature, so the magnetic field inside this motor changes significantly with changes in armature current. To prevent large losses and voltage drops in the field winding, its resistance should be as low as possible. Therefore, series-excited DC motors are usually wound with thicker wire and have fewer turns. 4. Compound-excited DC motor: The motor's magnetic flux is generated by the excitation currents in two windings.

S.A.T motor performance

The output torque of a motor decreases as speed increases, and drops sharply at higher speeds, so its maximum operating speed is generally between 300 and 600RPM. AC servo motors provide constant torque output, meaning they can output rated torque within their rated speed (generally 2000RPM or 3000RPM), and provide constant power output above the rated speed. Four, overload capability differs: stepper motors generally do not have overload capability. AC servo motors have strong overload capability. Five, operating performance differs: stepper motor control is open-loop control. If the starting frequency is too high or the load is too large, step loss or stalling may occur. If the speed is too high during stopping, overshoot may occur. Therefore, to ensure control accuracy, acceleration and deceleration must be handled properly. AC servo drive systems use closed-loop control. The driver can directly sample the feedback signal from the motor encoder, forming internal position and speed loops, generally avoiding step loss or overshoot phenomena common in stepper motors, making control performance more reliable. Six, speed response performance differs: it takes 200 to 400 milliseconds for a stepper motor to accelerate from standstill to its operating speed (generally a few hundred revolutions per minute). AC servo systems have better acceleration performance. Taking the Sanyo 400W AC servo motor as an example, it takes only a few milliseconds to accelerate from standstill to its rated speed of 3000RPM, making it suitable for control applications requiring rapid start-stop operations. In summary, AC servo systems outperform stepper motors in many aspects. However, stepper motors are often used as actuator motors in applications with lower requirements. Therefore, in the design of control systems, factors such as control requirements and cost must be comprehensively considered to select the appropriate control motor.

S.A.T motor excitation methods

Motor excitation method refers to the method of generating a magnetic field in rotating electrical machines. The excitation methods for DC motors are divided into four types: separately excited DC motor, shunt-excited DC motor, series-excited DC motor, and compound-excited DC motor. A DC motor where the field winding has no connection to the armature winding and is supplied by another DC power source is called a separately excited DC motor. Permanent magnet DC motors can also be regarded as separately excited or self-excited DC motors, and are generally referred to directly as having permanent magnet excitation. In a shunt-excited DC motor, the field winding is connected in parallel with the armature winding. As a shunt generator, the terminal voltage generated by the motor itself supplies the field winding; as a shunt motor, the field winding and armature share the same power source, and its performance is identical to that of a separately excited DC motor. In a series-excited DC motor, the field winding is connected in series with the armature winding, and then connected to the DC power source. The excitation current of this DC motor is the armature current. A compound-excited DC motor has two field windings: shunt and series. If the magnetomotive force produced by the series winding is in the same direction as that produced by the shunt winding, it is called cumulative compounding. If the directions of the two magnetomotive forces are opposite, it is called differential compounding. DC motors with different excitation methods have different characteristics. Generally, the main excitation methods for DC motors are shunt, series, and compound, while the main excitation methods for DC generators are separate, shunt, and compound.

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