SERVOMECH motor, Germany SERVOMECH model, SERVOMECH price

SERVOMECH motors are machines used to convert mechanical energy and AC electrical energy into each other. Due to the tremendous development of AC power systems, AC motors have become the most commonly used motors. Compared with DC motors, AC motors have a simple structure, are easy to manufacture, are relatively robust, and can be easily made into high-speed, high-voltage, high-current, and high-capacity motors because they do not have commutators (see commutation of DC motors). The power range of AC motors is very wide, from a few watts to hundreds of thousands of kilowatts, or even millions of kilowatts. In the early 80s of the 20th century, the largest steam turbine generator had reached 150 ten thousand kilowatts.

SERVOMECH motor development trends

The successful development of heat-resistant, high-performance neodymium-iron-boron permanent magnet materials for motor applications will enable their significant use in high-power permanent magnet synchronous motors. Demand for high-power electric motors is growing in transportation and industry, such as in electric vehicles, hybrid vehicles (combining internal combustion engines and electric motors), trains, elevators, machine tools, and robots. Marine propulsion motors require low speed and high torque. Traditional motors are difficult to use in special environments such as high temperature, high vacuum, or confined spaces, whereas rare-earth permanent magnet motors can withstand high temperatures (referring to samarium-cobalt or high-heat-resistance neodymium-iron-boron magnets) and have a compact size, precisely meeting these special requirements. Electric motors operating in special environments, such as manipulators in aerospace equipment, inspection robots in nuclear energy facilities, and semiconductor manufacturing equipment, require high-temperature and high-vacuum motors. A developed three-phase, four-pole permanent magnet motor with 150W and 3000r/min, operating in high temperatures of 200℃ to 300℃ and a vacuum level of 133.3×10-6Pa, has a diameter of 105mm and a length of 145mm, and uses Sm2Co17 permanent magnets with good high-temperature characteristics.

SERVOMECH 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 of 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/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 set of power transistors. This cycle allows the motor to continue rotating in the same direction until the control unit decides to stop the rotor by turning off the power transistors (or only turning on the lower arm power transistors); to reverse the rotor, the sequence of turning on the power transistors 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 alternating time of turning off and on 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, burning out the power transistors.

SERVOMECH motor classification

Motor classification: 1. Classification by power supply: Based on the different power supplies used, motors can be divided into DC motors and AC motors. AC motors are further divided into single-phase motors and three-phase motors. 2. Classification by structure and operating principle: Motors can be divided into DC motors, asynchronous motors, and synchronous motors based on their structure and operating principle. Synchronous motors can be further divided into permanent magnet synchronous motors, reluctance synchronous motors, and hysteresis synchronous motors. Asynchronous motors can be divided into induction motors and AC commutator motors. Induction motors are further divided into three-phase asynchronous motors, single-phase asynchronous motors, and shaded-pole asynchronous motors. AC commutator motors are further divided into single-phase series-wound motors, AC/DC universal motors, and repulsion motors. 3. Classification by starting and running method: Motors can be divided into capacitor-start single-phase asynchronous motors, capacitor-run single-phase asynchronous motors, capacitor-start-run single-phase asynchronous motors, and split-phase single-phase asynchronous motors based on their starting and running methods. 4. Classification by application: Motors can be divided into drive motors and control motors based on their application. Drive motors are further divided into motors for power tools (including drilling, polishing, grinding, slotting, cutting, reaming, and other tools), motors for home appliances (including washing machines, electric fans, refrigerators, air conditioners, recorders, VCRs, DVD players, vacuum cleaners, cameras, hair dryers, electric shavers, etc.), and motors for other general small mechanical equipment (including various small machine tools, small machinery, medical devices, electronic instruments, etc.). Control motors are further divided into stepper motors and servo motors. 5. Classification by rotor structure: Motors can be divided into squirrel-cage induction motors (formerly known as squirrel-cage asynchronous motors in old standards) and wound-rotor induction motors (formerly known as wound-rotor asynchronous motors in old standards) based on their rotor structure. 6. Classification by operating speed: Motors can be divided into high-speed motors, low-speed motors, constant-speed motors, and variable-speed motors based on their operating speed. 7. Classification by protection type: Open type, enclosed type: The rotating parts and live parts inside the motor housing have necessary mechanical protection to prevent accidental contact, but do not significantly impede ventilation. Protected motors are further divided into: mesh-covered type, drip-proof type, splash-proof type, enclosed type, waterproof type, watertight type, submersible type, and explosion-proof type based on their ventilation and protection structures.

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