Jenaer Antriebstechnik motor, German Jenaer Antriebstechnik model, Jenaer Antriebstechnik price

Jenaer Antriebstechnik motors are AC motors that generate electromagnetic torque through the interaction between the rotating magnetic field in the air gap and the induced current in the rotor windings, thereby converting electrical energy into mechanical energy. Three-phase asynchronous motors are primarily used as motors to drive various production machinery, such as fans, pumps, compressors, machine tools, light industrial and mining machinery, threshers and crushers in agricultural production, and processing machinery for agricultural by-products. They feature simple structure, ease of manufacturing, low cost, reliable operation, durability, high operating efficiency, and suitable operating characteristics.

Jenaer Antriebstechnik motor fault handling

Motor winding grounding, 1, Fault symptoms: live casing, loss of control in control circuits, short-circuit heating of windings, causing the motor to fail to operate normally. 2, Causes: moisture in windings reducing insulation resistance; long-term overload operation of the motor; corrosion by harmful gases; metal foreign objects entering the windings and damaging insulation; insulation damage touching the core during stator winding rewinding; winding ends touching the end cover or frame; insulation burns caused by stator-rotor friction; lead wire insulation damage contacting the casing; insulation breakdown due to overvoltage (such as lightning strikes). 3. Inspection methods: (1) Visual inspection. Observe the winding ends and insulation materials in the slots for damage or scorch marks; if present, these indicate the grounding point. (2) Multimeter inspection. Use the low-resistance range of a multimeter; if the reading is very low, it indicates grounding. (3) Megohmmeter method. Select different megohmmeters according to the rating to measure the insulation resistance of each winding group. If the reading is zero, it indicates that the winding is grounded. However, for motors with moisture-induced insulation issues or accidental breakdowns, judgment based on experience is required. Generally, if the pointer fluctuates unstably at "0", it can be considered to have a certain resistance value. (4) Test lamp method. If the test lamp lights up, it indicates winding grounding. If sparks or smoke are observed at a specific location, that location is the grounding fault point. If the lamp glows dimly, it indicates insulation breakdown. If the lamp does not light up but sparks appear when the test probe is grounded, it indicates that the winding has not broken down but is severely damp. You can also lightly tap the edge of the housing stop with a hard wood block; if the light flickers on and off at a certain point, indicating intermittent current flow, that point is the grounding location. (5) Current burn-out method. Use a variable transformer. After connecting to the power supply, the grounding point will heat up quickly, and the spot where the insulation smokes is the grounding point. Pay special attention that for small motors, the current must not exceed twice the rated current, and the duration must not exceed half a minute; for large motors, use 20%-50% of the rated current or gradually increase the current until smoke just appears at the grounding point, then immediately cut off the power. (6) Group elimination method. For grounding points inside the core with severe burning, where the burnt copper wire is fused with the core, the method involves splitting the grounded phase winding into two halves, and so on, to finally locate the grounding point. 4. Treatment methods: (1) For grounding caused by winding moisture, dry the windings first. When cooled to approximately 60–70°C, apply insulating varnish and dry again. (2) When insulation at the winding ends is damaged, re-insulate the grounding area, apply varnish, and dry again. (3) When the winding grounding point is in the slot, rewind the winding or replace part of the winding components. Finally, measure with different megohmmeters to ensure technical requirements are met.

Jenaer Antriebstechnik motor starting methods

Motor starting methods: First, split-phase starting, assisted by an auxiliary starting winding. Its starting torque is not high. The operating speed remains roughly constant. It is mainly applied to motors for electric fans, air conditioner fans, washing machines, etc. Second, when the motor is stationary, the centrifugal switch is closed. Upon powering on, the starting capacitor participates in the starting process. When the rotor speed reaches 70%～80% of the rated value, the centrifugal switch automatically opens, the starting capacitor completes its task and is disconnected. The starting winding does not participate in operation, and the motor continues to operate via the running winding coil. Third, when the motor is stationary, the centrifugal switch is closed. Upon powering on, the starting capacitor participates in the starting process. When the rotor speed reaches 70%～80% of the rated value, the centrifugal switch automatically opens, the starting capacitor completes its task and is disconnected. The running capacitor is connected in series with the starting winding to participate in operation. This connection is generally used in places with heavy and unstable loads, such as air compressors, cutting machines, and woodworking machine tools, as shown in Figure C. For motors with centrifugal switches, if the motor fails to start successfully within a very short time, the winding coils will quickly burn out. Capacitance values: Dual-value capacitor motors have large starting capacitance and small running capacitance, with voltage resistance generally greater than 400 V. Forward and reverse control: Typically, the resistance values of the starting winding and running winding of this type of motor are the same, meaning the wire diameter and number of turns are completely identical. This type of motor is generally used in washing machines. This forward and reverse control method is simple and does not require complex changeover switches. For forward and reverse control, simply swap lines 1–2 or swap lines 3–4 to achieve reversal. Judgment of starting and running windings: Typically, the DC resistance of the starting winding is much larger than that of the running winding, which can be measured with a multimeter. Generally, the DC resistance of the running winding is a few ohms, while the DC resistance of the starting winding is tens to hundreds of ohms.

Jenaer Antriebstechnik motor performance

Since the 20s of the 80th century, with the development of integrated circuits, power electronics technology, and AC variable speed drive technology, permanent magnet AC servo drive technology has made remarkable progress. Famous electrical manufacturers in various countries have successively launched their own series of AC servo motors and servo drives, continuously improving and updating them. AC servo systems have become the main development direction of contemporary high-performance servo systems, posing a crisis of obsolescence for original DC servos. Since the 90s, AC servo systems commercialized worldwide have adopted fully digital controlled sinusoidal motor servo drives. The development of AC servo drive devices in the transmission field is advancing rapidly. Compared with DC servo motors, the main advantages of permanent magnet AC servo motors are: 1. No brushes or commutators, resulting in reliable operation and low maintenance requirements. 2. Convenient heat dissipation for stator windings. 3. Low inertia, making it easy to improve system responsiveness. 4. Suitable for high-speed, high-torque operating conditions. 5. Smaller volume and weight for the same power.

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