TMS320F28052F: PMSM motor fan system low speed noise

Part Number: TMS320FF
Other Parts Discussed in Thread: MOTORWARE, TMS320FF

Hello Sir or Madam,

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This is Tan Ma, I am an electrical engineer. 

We have designed a motor drive based on TMS320FF to control a 60 Poles PMSM motor fan system (HVLS fans).

Right now the issue is my company is using the motorware 13, and at the low speed (10-25 rpm) the motor and fan systems have a grinding noise. I have tried several ways to eliminate those noise, such as adding deadtime compensation, decreasing the deadtime, modifying the current and speed loop PI gains, increasing the current and voltage feedback measurement resistors to increase the accuracy, modifying the PWM switching frequency and so on. But the noise is still there.

My firmware is developed base on the instaspin_foc labs for hvkit_rev1p1 development kit. Last week, I tried the motorware 18 firmware and used TMS320FF DSP. I just applied the lab 10a on the hvkit_rev1p1, and there is no noise at all. I have double checked the motor parameters and settings to make sure it is the same. 

After that, I have compared the current feedback waveforms. In closed loop mode, the TI hvkit_rev1p1 current feedback waveform is better than my drive. But it open loop mode (voltage/hertz) mode, my drive has a better current feedback signal. Therefore, I don't think it is the quality of the feedback measuring signals.

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So right not I am not clear that I couldn't eliminate the noise because of motorware version differences (V18 vs V13) or because of different DSP (TMS320FF (fixed point) VS TMS320FF (floating point)). 

 

Thank you very much and wait for you guys' reply. Any help will be appreciated. 

Dr. Tan Ma

 

Permanent Magnet Synchronous Motors (PMSM) driven HVLS industrial suspended ceiling fans are an efficient and energy-saving type of ventilation equipment. These HVLS fans utilize PMSM as the power source, which, due to its characteristics of high efficiency and power density, can provide strong airflow and stable operation performance. The PMSM offers high control precision, and through variable frequency speed regulation technology, it allows for accurate adjustment of HVLS fan speed to meet the needs of different environments and working conditions. Moreover, PMSM operates with low noise and vibration, contributing to a more comfortable working environment. In the industrial sector, these suspended ceiling HVLS fans are widely used in large workshops, warehouses, and other similar settings to effectively improve air quality and enhance the working environment. They also contribute to energy saving and emission reduction, aligning with the concept of sustainable development.

Specification ( reference value )

Diameter24ft (7.3m)20ft (6.7m)18ft (6.1m)17ft (5.1m)15ft (4.6m)12.8ft (3.9m)10ft (3.0m)ModelHVLS-B6PMSM73AHVLS-B6PMSM67AHVLS-B6PMSM61AHVLS-B6PMSM51AHVLS-B6PMSM46AHVLS-B6PMSM39AHVLS-B6PMSM30AVolumem³/minm³/minm³/minm³/minm³/minm³/minm³/minSpeed10-53RPM10-55RPM10-60RPM10-70RPM10-70RPM10-70RPM10-70RPMPower1.8KW1.2KW1.2KW1.0kW0.8kW0.5kW0.35kWNoise &#;dB&#;&#;39&#;38&#;37&#;36&#;36&#;36&#;36Weight &#;kg&#;Note: Above are some products, and the power supply supports 110V/220V/380V (50/60Hz).

Product diameter: The product diameter can be customized as required.

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