SPRINT ELECTRIC motor Germany SPRINT ELECTRIC model SPRINT ELECTRIC price

SPRINT ELECTRIC motors are equipped with a set of adjustable eccentric weights at each end of the rotor shaft, utilizing the centrifugal force generated by the high-speed rotation of the shaft and eccentric weights to obtain excitation force. Vibration motors have a wide vibration frequency range; only when the excitation power and power rating are properly matched can mechanical noise be reduced. Vibration motors have six classifications, such as by starting and operating mode, and by operating speed.

SPRINT ELECTRIC motor energy-saving measures

Measures to improve motor efficiency. Motor energy saving is a systematic project involving the full life cycle of the electric motor, from the design and manufacturing of the motor to the selection, operation, adjustment, maintenance, and scrapping of the motor. The effectiveness of energy-saving measures must be considered over the entire life cycle of the motor. Domestic and international practices mainly focus on improving motor efficiency from the following aspects. The design of energy-saving motors refers to the use of modern design methods such as optimization design technology, new material technology, control technology, integration technology, and testing technology to reduce motor power loss, improve motor efficiency, and design high-efficiency motors. While converting electrical energy into mechanical energy, the motor itself also loses a portion of energy. Typical AC motor losses are generally divided into three parts: fixed losses, variable losses, and stray losses. Variable losses change with load, including stator resistance loss (copper loss), rotor resistance loss, and brush resistance loss; fixed losses are independent of load, including core loss and mechanical loss. Core loss consists of hysteresis loss and eddy current loss, proportional to the square of the voltage, with hysteresis loss also inversely proportional to frequency; other stray losses are mechanical losses and other losses, including bearing friction loss and windage loss caused by rotation of fans, rotors, etc.

SPRINT ELECTRIC motor control method

Motor Direct Torque Control technology: Direct Torque Control (Direct Self-Control, DSC) constructs flux linkage and electromagnetic torque models on the stationary stator coordinate system, achieving control of electromagnetic torque and stator flux linkage by applying different voltage vectors. The direct torque control method has advantages such as simple algorithms and good torque response; therefore, it is widely used in applications requiring high transient torque response. Due to inherent disadvantages of the control, the direct torque control method has low control frequency and large torque ripple at low speeds. Therefore, reducing torque ripple at low speeds has become a research hotspot in direct torque control methods. Sun Xiaohui and others achieved good results by optimizing the action time of voltage vectors to reduce torque ripple at low speeds. D.casadei and others applied the direct torque control method to the control of AC induction motors based on discrete space vector modulation technology, reducing torque ripple.

SPRINT ELECTRIC motor structure

Motor rotor position sensors are of three types: photoelectric, magnetosensitive, and electromagnetic. Brushless DC motors using photoelectric position sensors are configured with photoelectric sensing devices at specific positions on the stator assembly, with a light-blocking plate installed on the rotor, and the light source is an LED or small bulb. When the rotor rotates, due to the action of the light-blocking plate, the photosensitive components on the stator will intermittently emit pulse signals at a certain frequency. Magnetosensitive position sensors refer to semiconductor sensitive elements whose characteristics change according to certain laws with the surrounding magnetic field; their basic principles are the Hall effect and magnetoresistive effect. The main working principle of magnetosensitive elements is the magnetic effect of current, primarily the Hall effect. In brushless DC motors using magnetosensitive position sensors, their magnetosensitive sensing devices (such as Hall elements, magnetosensitive diodes, magnetosensitive transistors, magnetoresistors, or specialized integrated circuits) are mounted on the stator assembly to detect changes in the magnetic field produced by the permanent magnets during rotor rotation. Brushless DC motors using electromagnetic position sensors install electromagnetic sensor components on the stator assembly; when the position of the permanent magnet rotor changes, the electromagnetic effect causes the electromagnetic sensor to generate a high-frequency modulated signal (whose amplitude varies with the rotor position). In recent years, sensorless brushless DC motors have also appeared. These motors use the back electromotive force of the stator windings as the position signal of the rotor magnet. After this signal is detected, it is processed by digital circuits and sent to the logic switching circuit to control the commutation of the brushless DC motor. Since it eliminates the need for position sensors, making the structure of the brushless motor more compact, its application is becoming increasingly widespread.

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