Description
Features • Benchmark control performance on rotary and linear valves • Superior diagnostics and data storage capabilities • Local and remote configuration • Easy interpretation of diagnostics data • Efficient mounting program for all types of actuators • Low power consumption • Available for HART, PROFIBUS-PA and FOUNDATION Fieldbus networks • Reliable and robust design • Device self diagnostics • SIL 2 approved device • On-line, performance and communication diagnostics • Hot swap support: possibility to install also on valves that are in process with 1-point calibration feature Applications • ND9000 can be integrated with all major DCS systems • Mounting kits for any 3rd party actuators • Remote mounting • Marine approved
The servo driver, also known as the servo amplifier or amplifier, is a device that outputs the pulse signal or analog signal input from the controller to the motor after internal calculation and amplification. Drive control mode (1) PWM control (Shadik driver) PWM control technology: control the on-off and off-off of semiconductor switching devices, so that the output end can get a series of pulses with equal amplitude and unequal width, and use these pulses to replace sine waves or other required waveforms. By modulating the width of each pulse according to certain rules, the output voltage of the inverter circuit can be changed, and the output frequency can be changed. Advantages: 1) Low noise; 2) High efficiency at full load and can work in continuous conduction mode; 3) The ripple voltage is small; 4) The switching frequency is fixed, so the noise filter design is easier and the noise elimination is simpler; 5) The control method is easy to implement. Cons: 1) Due to the influence of the error amplifier, PWM loop gain and response speed are limited, PFM has a fast response speed; 2) PWM is less efficient at low load. 3) PFM control (Panasonic Drive)
The frequency of the modulated signal varies with the amplitude of the input signal, and its duty cycle is unchanged. Because the modulated signal is usually a square-wave signal with a change in frequency, PFM is also called square-wave FM.
Advantages:
1) The main advantage of PFM compared with PWM is efficiency;
2) PFM has the advantage of low static power consumption;
3) No finite flow function can not work in continuous conduction mode;
4) Compared with PWM, the output current of PFM is small;
For PFM and PWM with the same peripheral circuit, the peak efficiency PFM is comparable to PWM, but before the peak efficiency, the efficiency of PFM is much higher than that of PWM, which is the main advantage of PFM
Cons:
1) Filtering is difficult (harmonic spectrum is too wide);
2) The PFM frequency is lower than the PWM frequency, which will cause the output ripple larger than the PWM;
3) PFM control is more expensive than PWM control.
The company focuses on DCS, PLC, robot, large servo four systems
The main products are various modules/cards, controllers, touch screens, servo drivers
Company advantage: Supply imported original products, professional production of spare parts
One year warranty, fast delivery time, complete supply !！！
① 24 hours email response (12 hours);
② For shipment outside Asia, please contact the seller.
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