BEFARED motor Germany BEFARED model BEFARED price

BEFARED motors are a new generation of gear reduction motors, featuring compact size, low noise, maintenance-free operation, and an attractive appearance. The speed ranges from 0.83r/min to 300r/min. This series of low-speed motors is a new high-tech product that integrates electromagnetic drive and reduction mechanism within the motor housing. The low speed and high torque directly meet customer requirements without the need for additional reduction devices. The motor uses Class B and Class F insulation, with protection ratings of IP44 and IP55, and voltages of 220V and 380V.

BEFARED motor applications

The motor requires only a single-phase power supply, so it is widely used in small equipment for production and daily life. However, due to its relatively poor economic performance indicators, it is manufactured only in low power ratings. Single-phase resistance-start asynchronous motor: Power ranges from 60 to 370W. Its feature is that no external phase-splitting component is added; it starts using the resistance of the auxiliary winding itself and uses a centrifugal switch to disconnect the auxiliary winding at the end of starting. The structure is relatively simple. It has medium starting torque and overload capacity, making it suitable for small machine tools, blowers, and medical machinery. Single-phase capacitor-start asynchronous motor: Power ranges from 120 to 750W. It is a single-phase motor that starts by increasing the starting torque using an external capacitor. An external capacitor is connected in series with the auxiliary winding, and both the auxiliary winding and the capacitor are disconnected from the power supply by a centrifugal switch at the end of starting. Like the BO2 type, it operates with only the main winding, while the auxiliary winding remains idle. Capacitor-start motors have higher starting torque but medium overload capacity. They are suitable for air compressors, refrigerators, washing machines, grinding mills, threshers, and water pumps. Single-phase capacitor motor: This is a single-phase motor that uses one capacitor for both starting and running. The auxiliary winding, capacitor, and main winding all participate in operation. Therefore, no centrifugal switch is required. Proper design creates an ideal rotating magnetic field during operation, resulting in good motor performance, high efficiency and power factor, and low noise. Its power range is 4 to 250W. Since one capacitor serves both starting and running, and considering the pros and cons, the starting time is very short. When selecting the capacitor value, the aim is to meet the needs of long-term operation as much as possible, so a cheaper, smaller-value capacitor is chosen. Consequently, this motor has lower starting torque and can only be used in machinery that starts under no-load or light-load conditions, such as electric fans, ventilation fans, and tape recorders. Dual-value capacitor motors have higher power, and the required capacitors are significantly more expensive. These motors offer good starting and running performance. They are suitable for household appliances and small machine tools.

BEFARED motor fault analysis

The engine speed and crankshaft position sensors detect the speed signal and provide the crankshaft position signal during engine operation, serving as the primary basis for various controls by the control system. If the sensor or its wiring fails, the ECU cannot receive the speed and crankshaft position signals, making it impossible to correctly control fuel injection and ignition timing. This results in the injectors not operating and the spark plugs not firing. Using a stethoscope and a timing light for inspection can confirm whether the injectors and spark plugs are working. When the above faults occur, the self-diagnostic system usually displays fault codes. A comprehensive inspection should be carried out on the speed sensor, No. 1 and No. 2 camshaft position sensors, and their wiring. First, disconnect the connectors of each sensor and check their resistance. If the resistance is abnormal, they must be replaced; if normal, check whether the wiring and connectors between the ECU and each sensor are normal. If the fuel pump or control circuit fails, the fuel supply system will have no fuel pressure. Even if the injectors work normally, fuel cannot be injected properly. The inspection method is: use a jumper wire to connect diagnostic plug terminals +B and FP, then turn on the ignition switch (without starting the engine) to check for pressure in the fuel inlet hose. If there is pressure in the hose and a return fuel sound can be heard, the fuel pump itself is fine; otherwise, the fuel pump should be checked. Use a multimeter to measure the resistance between terminals 4 and 5. If it does not match the specification, the fuel pump needs to be replaced. If the fuel pump works normally, its control circuit should be checked, mainly including the fuse, EFI main relay, fuel pump relay, resistor, and all wiring and connectors.

BEFARED motor classification

Embedding a short-circuit copper ring or short-circuit coil (group) in part of the stator poles forms a shaded-pole single-phase motor. Shaded-pole single-phase motors include salient-pole and non-salient-pole types. When the stator winding is supplied with single-phase AC current, most of the pulsating magnetic flux it generates couples directly to the rotor through the air gap, while a small portion of the flux induces magnetic flux when passing through the shaded-pole copper ring. This induced flux combines with the original flux and enters the rotor magnetic circuit through the air gap. According to Lenz's law, the induced magnetic flux always opposes the change in the original magnetic flux, and its phase lags behind the original flux. This creates two magnetic fluxes that are spatially displaced by a certain angle and have a certain phase difference. The resulting magnetic field is a rotating magnetic field with a high degree of ellipticity. The rotation direction of a shaded-pole motor is fixed, moving from the unshaded part to the shaded part. It has low power, small starting torque, simple structure, low price, and easy maintenance. Shaded-pole motors are generally used in small blower motors and fan motors.

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