1. Overview
TYP series high-efficiency permanent magnet variable frequency synchronous motors must be used in conjunction with permanent magnet motor frequency converters. The rotor of this series of motors has a built-in permanent magnet structure, and the special design of different vertical and vertical axis magnetic circuits makes this series of motors have a certain salient pole torque. Therefore, the frequency converter needs to use the maximum torque/current ratio control mode to control the work, so that this series of motors have a higher power factor in the full speed range, a smaller operating current, and lower copper consumption.
The speed of the TYP series high-efficiency permanent magnet variable frequency synchronous motor is synchronized with the stator rotating magnetic field, there is no slip, and the slip power is saved so that the TYP series of high-efficiency permanent magnet variable frequency synchronous motor has high efficiency and energy saving effect in the full speed range obvious.
TYP series high-efficiency permanent magnet frequency conversion synchronous motors are widely used in injection molding machines, air compressors, pipe-making equipment, hydraulic machinery, food machinery, cement pipe-making machines, plastic extruders, wire drawing machines, and pharmaceutical equipment.
Our company is equipped with a dedicated control cabinet for this series of products, which can be customized according to user requirements.
2. The motor is used under the following conditions
Altitude: not more than 1000m Environment temperature: -15～+40℃
Reference frequency: 50, 75, 125, 150, 180, 250Hz (can be customized according to users)
Frequency modulation range: below the rated frequency is constant torque speed regulation, above the rated frequency there is a certain weak magnetic speed regulation capability Voltage: 380V±10%, 660V±10%
Protection level: IP54 or IP55
Thermal classification (insulation class): 130 (B), 155 (F)
Cooling method: IC411, IC416
Executive standard: Q/1083 SLJ 018-2018
3. Motor model meaning
4. Installation size
B3 Installation Form B5 Installation Form B35 Installation Form
The picture above is the installation form of B3, B5, B35
5. Matters needing attention:
5.1 TYP series high-efficiency permanent magnet variable frequency synchronous motors must be used in conjunction with permanent magnet motor inverters, and have to be directly connected to three-phase power through the inverter;
5.2 TYP series high-efficiency permanent magnet variable frequency synchronous motor frequency converter must adopt the maximum torque/current ratio control method, otherwise it cannot reach the best working state, which will reduce the power factor and torque of the motor;
5.3 TYP series high-efficiency permanent magnet variable frequency synchronous motors are Y-connected, and Y/△ conversion is not allowed.
6. Energy saving principle of permanent magnet synchronous motor:
6.1 High efficiency: Compared with Y2 series motors, the average power saving is over 10%. Generally, when the efficiency of asynchronous motors is below 60% of the rated load, the efficiency will drop quickly, and the efficiency will be very low at light load; the efficiency of asynchronous motors will drop quickly with the decrease in speed, so the efficiency of asynchronous motors is very low at low speed and low load. TYP series high-efficiency permanent magnet variable frequency synchronous motors are in the high-efficiency zone at 20%～110% rated load. According to field measurements by multiple manufacturers under different working conditions, the energy-saving rate of high-efficiency permanent magnet variable frequency synchronous motors is between 10% and 40%.
6.2 The power factor is high, and the actual measured value in the rated state is close to the limit value of 1.0, which is above 0.95. The power factor curve and efficiency curve of the TYP series high-efficiency permanent magnet variable frequency synchronous motor are high and flat; the power factor is high and the stator current is small, thereby reducing the stator copper consumption. Improve efficiency.
6.3 Small current: Because this series of motors adopt a built-in rotor magnet structure with a certain salient torque, and then adopt the maximum torque/current ratio control method, the motor has a higher power factor in the full speed range. , The motor current drops significantly. According to actual measurements, the stator current value of the high-efficiency permanent magnet variable frequency synchronous motor can be reduced by 15% to 30% compared with the asynchronous motor, and the motor current is greatly reduced, reducing the loss in cable transmission, which is equivalent to expanding the capacity of the cable.
6.4 Running without slip, stable speed: TYP series high-efficiency permanent magnet variable frequency synchronous motors are synchronous motors. The speed of the motor is only related to the frequency of the power supply. The speed of the motor is synchronized with the speed of the stator rotating magnetic field. It is not affected by voltage fluctuations and load size. Lost rotation, no slip, no slip power loss, thereby improving efficiency and control accuracy.
6.5 Low-temperature rise 15～20℃: Because TYP series high-efficiency permanent magnet variable frequency synchronous motor has high efficiency and low loss, the temperature rise is low. Through actual measurement, under the same conditions, the operating temperature of the high-efficiency permanent magnet variable frequency synchronous motor is 15-20℃ lower than that of the asynchronous motor.
Temperature rise comparison chart
7. Motor installation
7.1 The motor is allowed to be driven by couplings, spur gears, and pulleys.
7.2 When using a belt drive, the motor shaft center line is parallel to the load shaft center line, and the belt center line is required to be perpendicular to the shaft center line; when using coupling transmission, the motor shaft center line and the load shaft center line should coincide.
7.3 The installation of the motor should ensure its good ventilation and cooling conditions.
8. Motor operation
8.1 The motor should be properly grounded, and there is a grounding device in the junction box. If necessary, the motor’s foot fastening bolts can also be used for grounding.
8.2 There are 6 terminals on the terminal board of the motor.
The wiring of frame numbers 315 and below is shown in Figure 1. The stator windings have been Y-connected, and only three wires with terminals are drawn out. They are connected to the terminals of terminal boards U1, V1, and W1. The inverter outputs U, V, and W are connected to these three terminals, U2, V2, and W2 are not connected or connected;
Figure 2 shows the wiring of frame size 355 and above. The stator winding has been Y connected, and six wires with terminal blocks are drawn out. They are connected to the terminals U1, U1, V1, V1, W1, W1, and two U1 when wiring. Connect the inverter to output phase U, connect two V1 to connect the inverter to output V phase, and connect two W1 to connect the inverter to output W phase.
Connect as shown below.
8.3 When the three-phase power supply is connected to the terminal U1, V1, W1 according to the inverter phase sequence U, V, W, the rotation of the motor is clockwise from the shaft extension end, and the phase sequence of the two variable frequency power supplies can be replaced at will. The rotation of the motor becomes counterclockwise.
8.4 Motors that work continuously must not be overloaded
8.5 There should be no intermittent or abnormal sound or vibration when the motor is running with no load or load, and the bearing temperature should not exceed 95℃.
9. Maintenance and repair of electric motors
9.1 The operating environment should always be kept dry, the surface of the motor should be kept clean, and the air inlet should not be obstructed by dust, fibers, etc.
9.2 When a protection alarm occurs, the cause of the failure should be found out, and the operation can only be put into operation after the failure is eliminated.
9.3 When the machine is stopped for inspection, the operation can only be carried out after the motor has completely stopped.
9.4 In order to ensure good lubrication of the motor during operation, the motor should run for about 4000 hours, that is, the grease should be supplemented or replaced (the closed bearing does not need to be replaced during the service life). When the bearing is found to be overheated or the grease has deteriorated during operation, The grease should be replaced in time. When replacing the grease, remove the old grease and clean the oil grooves of the bearings and bearing caps with gasoline. For motors with a speed of 1500r/min and below, refill the bearing grease type for medium and small motors bearing grease No. 2, and fill the inner and outer rings of the bearing About two-thirds of the gap between the bearings; the motor speed of 2500r/min and above is filled with bearing grease type HTHS, which fills about one-half of the gap between the inner and outer rings of the bearing.
9.5 When the life of the bearing is over, the vibration and noise of the motor will increase obviously. Check that the radial clearance of the bearing reaches the value in the table below, and the bearing should be replaced.
9.6 Maintenance of TYP series high-efficiency permanent magnet variable frequency synchronous motors requires qualified units or personnel who understand the precautions for TYP series high-efficiency permanent magnet variable frequency synchronous motors.
9.7 When disassembling the motor, the rotor can be taken out from the shaft extension end or the non-shaft extension end. If it is not necessary to remove the fan, it is more convenient to remove the rotor from the non-shaft extension end. When extracting the rotor from the stator, prevent damage to the stator winding or insulation.
9.8 When replacing the winding, the form, size, number of turns and wire gauge of the original winding must be noted. Random replacement of the original design windings often deteriorates one or several performances of the motor, or even cannot be used at all.
10. Storage and transportation of electric motors:
10.1 The motor should be kept dry during storage to avoid sudden changes in ambient temperature.
10.2 The storage of the motor should not be too high to avoid damage to the lower motor.
10.3 The motor should be prevented from tipping or inverting during storage and transportation.
