PIV motor Germany PIV model PIV price

PIV motor refers to a low-power single-phase asynchronous motor powered by a single-phase AC power supply (AC220V). This type of motor typically has two-phase windings on the stator, and the rotor is of the standard squirrel-cage type. Different distributions of the two-phase windings on the stator and different power supply conditions can produce different starting and operating characteristics.

PIV motor fault analysis

The engine speed and crankshaft position sensors detect speed signals and provide crankshaft position signals during engine operation, serving as the main basis for various controls by the control system. If the sensor or its wiring fails, the ECU cannot receive the speed signal and crankshaft position signal, making it impossible to correctly control fuel injection and ignition timing, resulting 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, the 1 camshaft position sensor, and the No. 2 camshaft position sensor and their wiring. First, disconnect the connectors of each sensor and check their resistance. If the resistance value 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, it will also cause a lack of fuel pressure in the fuel supply system. Even if the injectors work normally, the fuel cannot be injected properly. The inspection method is: use a jumper wire to connect the 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, it indicates that 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 specified value, the fuel pump needs to be replaced. If the fuel pump works normally, its control circuit should be checked, mainly including fuses, the EFI main relay, fuel pump relay, resistors, and all wiring and connectors.

PIV motor classification

Based on the excitation of the mover, motors can be divided into conventional linear synchronous motors with DC-excited mover poles and permanent magnet linear synchronous motors with permanent magnet mover poles. The magnitude of the excitation magnetic field in the former is determined by the magnitude of the DC current. By controlling the excitation current, the tangential traction force and lateral attraction force of the motor can be changed. This motor structure allows the tangential and lateral forces to be controlled separately. In permanent magnet linear synchronous motors, the pole magnetic field is provided by permanent magnets, and the pole mover does not require external power excitation, which simplifies the motor structure and improves overall efficiency, but the pole magnetic field is not adjustable.

PIV motor performance

Motor technology has been widely applied in the aviation, aerospace, and mold industries. High-speed machine tools and virtual axis machine tools represent major breakthroughs in machine tool technology. Whether for ordinary CNC machine tools or virtual axis machine tools, the key component for achieving high speed is still the spindle unit. Spindle high speed is commonly measured by the dn value (the dn value refers to the product of the average diameter (mm) of the spindle bearings and the limit speed (r/min) of the spindle). With the development of bearing and lubrication technologies, spindle speeds have increased year by year. Data shows that after the development of oil-air lubrication devices and the adoption of angular contact ceramic ball bearings, new lubrication methods such as jet lubrication were adopted in the 90s. For spindle units with speeds above 10000r/min, drive via belts or couplings is no longer suitable. A more reasonable approach is direct drive using an built-in motor, where the motor rotor is directly mounted on the spindle and the stator is installed in the spindle sleeve, forming what is known as an electric spindle. This electric spindle has advantages such as compact structure, ease of balancing, and high transmission efficiency, making it an ideal structure for high-speed spindles. In addition to being significantly affected by bearings and their lubrication technology, the performance of electric spindles is influenced by many other factors, including control of bearing preload, heating and cooling of the built-in motor, dynamic balancing of the spindle, and connection of parts on the shaft.

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