Application of RNB2000 Frequency Converter in Permanent Magnet Synchronous Motor
1. Permanent magnet synchronous motor
1. Principle of permanent magnet synchronous motor
The rotor of the super-efficient permanent magnet synchronous motor is excited by rare earth permanent magnets, and the rotor does not need excitation current. Therefore, when the motor is running, the rotor has no resistance loss, the stator reduces the resistance loss, and the total motor loss is reduced by 20%. Secondly, because the magnetic field of the permanent magnet motor is generated by the rare earth permanent magnets, there is no need to increase the reactive excitation current from the stator, and the power factor of the motor can be greatly improved to 0.95-1, which makes the current in the stator winding of the motor significant Reduced, thereby increasing the efficiency of the motor by 2 to 6 percentage points, reaching and exceeding the international IE3-IE4 standards, featuring high efficiency, high power factor, low operating current, low temperature rise, wide economic operating range, and high energy saving return.
2. The advantages of permanent magnet synchronous motors
Compared with ordinary motors, permanent magnet synchronous motors have the following advantages:
1) The speed is constant, which is synchronous speed.
The power factor is high. When the permanent magnet motor is in normal operation, the rotor speed is the same as the stator magnetic field speed, there is no current on the rotor squirrel cage, and the induced current on the stator is reduced, so the power factor is high.


功率因數(shù)曲線圖（永磁電機與異步電機）Power factor graph (permanent magnet motor and asynchronous motor)
功率因數(shù)Power factor
普通異步電機 Ordinary asynchronous motor
永磁同步機Permanent magnet synchronous machine
負載率 Load factor
典型的功率因數(shù)曲線對比Comparison of typical power factor curves
3) 運行效率高。永磁電機正常運轉時，由于轉子上有永磁體，靠永磁體的磁場就可以保證電機的正常運轉，因此轉子鼠籠條沒有電流，也就沒有繞組損耗。轉子鐵耗也沒有，因此效率較普通電機高的多。
3) High operating efficiency. When the permanent magnet motor is running normally, because there are permanent magnets on the rotor, the normal operation of the motor can be ensured by the magnetic field of the permanent magnet, so the rotor squirrel cage has no current and no winding loss. The rotor has no iron loss, so the efficiency is much higher than that of ordinary motors.

效率曲線圖（永磁電機與異步電機）Efficiency graph (permanent magnet motor and asynchronous motor)
效率%effectiveness%
普通異步電機Ordinary asynchronous motor
永磁同步電機Permanent magnet synchronous motor
負載率Load factor
典型的效率曲線對比Comparison of typical efficiency curves
4) 具有較寬的經(jīng)濟運行范圍。普通電機的經(jīng)濟運行范圍一般為額定負載的60-100%，低于60%的負載時，電機的效率和功率因數(shù)曲線下降很快，運行效率和功率因數(shù)很低。而永磁電機的經(jīng)濟運行范圍遠比普通電機寬，不僅在額定負載時效率很高，而且在25-120%額定負載范圍內(nèi)都有較高的效率，效率曲線比較平滑，變化不大。電機效率基本不低于額定效率的80%。而普通電機在35%額定負載附近效率迅速下降，能低至30-40%。永磁電機在25%負載時，功率因數(shù)也可以達到0.9以上，越輕載功率因數(shù)越高，而普通電機在從額定負載時的0.85左右迅速下降到0.5以下。
4) It has a wide range of economic operation. The economic operating range of an ordinary motor is generally 60-100% of the rated load. When the load is lower than 60%, the efficiency and power factor curve of the motor will drop quickly, and the operating efficiency and power factor will be very low. The economic operating range of permanent magnet motors is much wider than that of ordinary motors. It not only has high efficiency at rated load, but also has higher efficiency in the range of 25-120% of rated load. The efficiency curve is relatively smooth and does not change much. The motor efficiency is basically not less than 80% of the rated efficiency. The efficiency of ordinary motors drops rapidly near 35% of the rated load, and can be as low as 30-40%. The power factor of permanent magnet motors can reach above 0.9 when the load is 25%, the lighter the load, the higher the power factor, while the normal motor quickly drops from 0.85 at the rated load to below 0.5.
5) 體積小，重量輕。由于永磁電機轉子上應用了稀土永磁材料，損耗低，效率和功率因數(shù)高，達到同樣的功率，在保證效率和功率因數(shù)的基礎上，體積可以做的比普通電機小，重量輕。
5) Small size and light weight. Because the permanent magnet motor rotor uses rare earth permanent magnet materials, it has low loss, high efficiency and power factor, and achieves the same power. On the basis of ensuring efficiency and power factor, the volume can be made smaller and lighter than ordinary motors.
6) 堵轉轉矩倍數(shù)高。普通電機堵轉轉矩倍數(shù)一般是額定轉矩的1.6-2.3倍，而永磁電機的堵轉轉矩一般可達2.4倍以上。
6) The locked-rotor torque multiple is high. The locked-rotor torque of ordinary motors is generally 1.6-2.3 times the rated torque, while the locked-rotor torque of permanent magnet motors can generally reach more than 2.4 times.

7、可以實現(xiàn)低速高效率。普通電機10極以上的電機很少，因為轉速越低，效率越低。永磁電機可以把技術做的很高，有24極甚至32極。轉速做的很低，可以對一些設備采用直驅，省去減速設備，從節(jié)能的角度來講，可以提高效率。
7. It can achieve low speed and high efficiency. There are few ordinary motors with more than 10 poles, because the lower the speed, the lower the efficiency. Permanent magnet motors can be very high in technology, with 24 poles or even 32 poles. The speed is very low, and direct drive can be used for some equipment, eliminating the need for deceleration equipment, and from the perspective of energy saving, it can improve efficiency.
二、雷諾爾RNB2000系列同步變頻驅動器
1、產(chǎn)品特點
RNB2000系列變頻器是一款高性能矢量變頻器，功能豐富、強大、性能優(yōu)異穩(wěn)定，可驅動三相交流異步電機或三相交流永磁同步電機，在控制和調節(jié)電機的轉矩和速度、低速高轉矩輸出等方面，具有良好的動態(tài)性能、超強的過載能力。支持多種IO擴展板卡、多種PG板卡、多種通訊擴展板卡，廣泛用于各種自動化生產(chǎn)設備及各類自動化生產(chǎn)線。
1) 采用美國TI公司新一代電機控制專用數(shù)字信號處理器(DSP),主頻可達150MHZ。
2) 采用的過Infineon第四代IGBT模塊，結合其175℃最高結溫特性，運用新穎的PWM調制方式，進一步降低了開關損耗，是的驅動器在50℃環(huán)境溫度下，也無需降額使用。
3) 支持異步電機和永磁同步電機驅動。
4) V/F控制模式下，高精度的電流限制控制，使得驅動器無論是快速加減速還是堵轉，都不會出現(xiàn)過流報警，可靠的保護驅動器；矢量控制模式下，高精度的轉矩限定控制，使得驅動器可以按用戶工藝控制要求，輸出強勁的轉矩或柔和的轉矩，可靠的保護機械設備。
Two, Renault RNB2000 series synchronous variable frequency drive
1. Product features
The RNB2000 series inverter is a high-performance vector inverter with rich functions, powerful, excellent and stable performance. It can drive three-phase AC asynchronous motors or three-phase AC permanent magnet synchronous motors. It can control and adjust the torque and speed of the motor at low speed. In terms of high torque output, it has good dynamic performance and super overload capacity. It supports a variety of IO expansion boards, a variety of PG boards, and a variety of communication expansion boards, which are widely used in various automated production equipment and various automated production lines.
1) Adopt a new generation of dedicated digital signal processor (DSP) for motor control from TI Company, the main frequency can reach 150MHZ.
2) The adopted Infineon fourth-generation IGBT module, combined with its 175°C maximum junction temperature characteristic, uses a novel PWM modulation method to further reduce the switching loss, and the driver does not need to be derated at an ambient temperature of 50°C.
3) Support asynchronous motor and permanent magnet synchronous motor drive.
4) In the V/F control mode, the high-precision current limit control makes the drive no matter whether it is fast acceleration or deceleration or stalling, there will be no over-current alarm, and the drive can be reliably protected; in the vector control mode, high-precision torque Limited control allows the driver to output strong torque or soft torque according to user process control requirements, and reliably protect mechanical equipment.

Control mode Starting torque Speed range Speed accuracy Torque response
VF control
No PG vector control
With PG vector control



交流永磁同步機 AC permanent magnet synchronous machine
交流異步電機AC asynchronous motor
5) 過程PID控制，具有豐富的給定和反饋方式。
6) 支持直流電源的輸入，方便用戶組成公共直流母線的應用方案。
7) 過壓失速保護。
8) 欠電壓調節(jié)。
9) 過流失速保護功能。
5) Process PID control, with rich setting and feedback methods.
6) Support the input of DC power supply, which is convenient for users to compose the application scheme of public DC bus.
7) Overvoltage stall protection.
8) Undervoltage regulation.
Over-current stall protection function.
3.3.2 產(chǎn)品使用環(huán)境
產(chǎn)品安裝場所：戶內(nèi)
環(huán)境溫度：最高溫度：+40℃
最低溫度：-10℃
海拔高度：< 1000m。
日平均相對濕度：不大于95%；
月平均相對濕度：不大于90%。
地震烈度不超過8度。
戶內(nèi)環(huán)境污穢等級：Ⅱ級
3.3.2 Product use environment
Product installation place: indoor
Ambient temperature: Maximum temperature: +40℃
Minimum temperature: -10℃
Altitude: <1000m.
Daily average relative humidity: not more than 95%;
Monthly average relative humidity: not more than 90%.
The earthquake intensity does not exceed 8 degrees.
Indoor pollution level: Ⅱ level
3.3.3 產(chǎn)品技術參數(shù)3.3.3 Product technical parameters
project specification
Input and output characteristics Input voltage range Three-phase 380VAC±15%
Input frequency range 50～60Hz±5%
Output voltage range 0～rated input voltage
Output frequency range 0～600Hz, unit 0.01Hz
Output overload capacity 150% for 1 minute; 180% for 10 seconds; 200% for 1 second
Operation control characteristics
way to control V/F control
Speed range
No PG vector control 0 (applicable to synchronous machine)
Speed control accuracy
No PG vector control 1 (applicable to asynchronous machine)
Speed fluctuation
Asynchronous motor 1:200 (V/F, vector control without PG 1)
Torque response Synchronous machine 1:20 (vector control without PG 0)
Torque control accuracy ±0.5% (V/F control)
Starting torque ±0.2% (vector control without PG)
basic skills
Starting frequency ± 0.3% (vector control without PG)
Acceleration and deceleration time <20ms (vector control without PG)
Carrier frequency 10% (No PG vector control)
Frequency setting method Asynchronous motor: 0.25Hz/150% (vector control without PG 1)
Starting method Synchronous machine: 2.5 Hz/150% (vector control without PG 0)
Stop mode 0.00～10.00Hz
Motor type 0.1～3000.0s
Dynamic braking capability 1.0kHz～16.0kHz
DC braking capability UP/DOWN setting, digital setting, analog setting, pulse frequency setting, multi-speed operation setting, simple PLC setting, PID setting, Modbus communication setting, PROFIBUS communication setting, etc.
Automatic voltage adjustment Realize the set combination and the switch of the set channel.
Instant down frequency Starting frequency start, DC braking first and then start, speed search start
Control terminal Switch input terminal Deceleration stop, free stop, deceleration stop + DC braking, deceleration stop + magnetic flux braking
Analog input terminal Support asynchronous motors, permanent magnet synchronous motors
Switch output terminal Braking unit operating voltage: 320～750V
Analog output terminal DC braking frequency: 0～300Hz;
Relay output DC braking waiting time: 0～50s;
Communication standard interface
RS485 communication DC braking current: 0.0～100.0% (rated current of the inverter);
Expansion communication port
PROFIBUS, Ethernet, CANopen, DC braking time: 0.0～50.0s;
Fail safe
Acceleration overcurrent, deceleration overcurrent, constant speed overcurrent, acceleration overvoltage,
Special function
Deceleration overvoltage, constant speed overvoltage, bus undervoltage fault, motor overload,
Keyboard display
The inverter is overloaded, the input phase is abnormal, the output phase is abnormal, the rectifier module is overheated, Standard 10 inputs, one of which can be used as high-speed pulse input (HDI1)
others Inverter module overheating fault, external fault, communication fault, current detection fault, Standard 3 analog inputs, AI1:0～10V or 0/4～20mA input optional
Motor parameter identification failure, EEPROM operation failure, PID feedback disconnection failure, brake unit failure, AI2: 0～10V or 0/4～20mA input optional
Factory set time arrived AI3: -10V～+10V input
Parameter copy, parameter backup, common DC bus, free switching of two sets of motor parameters, frequency switching, DC braking, short circuit braking, magnetic flux braking, user password use, overmodulation function, synchronous motor vector control, speed tracking, swing Frequency control, fixed-length control, counting function, pre-excitation, over stall speed, over voltage stall, power failure restart, jump frequency, 4 groups of acceleration and deceleration time, motor over temperature protection, flexible fan control, process PID control, multi-stage Speed control, instantaneous frequency reduction function, simple PLC control, droop control, parameter identification, field weakening control, high-precision torque control, V/F separation control, fault recording, etc. Standard 2 multi-function collector outputs, 1 of which can be used as high-speed pulse output (HDO)
LED display Standard 2 outputs AO1, AO2 (0～10V or 0/4～20mA optional)
Use place Standard 2 relay outputs