Dalian Lianda holdings announced that its world peace launched a brushless DC motor drive microprocessor solution based on NXP lpc1500 and Toshiba tmpm375.

The issue of energy conservation and emission reduction has been paid more and more attention all over the world. EPRI pointed out that the cost of global motors is as high as US $95 billion a year, accounting for 51% of all electric power. Whether it is industrial, household or commercial electricity, the energy consumption of motor occupies a high proportion. If we improve the output and input power ratio of the motor system, we can improve the power efficiency. Brushless DC motor has the advantages of high efficiency and energy saving, good control characteristics, high reliability, long life, low noise, and is replacing AC motor in more and more home appliances. Compared with the traditional AC motor, the efficiency of DC motor is greatly improved, especially in the low speed region, which improves the energy efficiency ratio of the system.

In view of the global trend of energy saving and emission reduction, worldpeace of Dalian United University launched NXP and Toshiba microprocessor-based brushless DC motor control scheme, aiming to provide a more rapid, simple, high-precision and flexible motor control scheme.

Can module realizes industrial connectivity while USB simplifies field upgrade

Figure 1 – Comparison between DC motor and AC motor

Can module realizes industrial connectivity while USB simplifies field upgrade

Figure 2 – block diagram of brushless motor drive scheme of Dalian dashiping group

Dalian dashiping group has launched the following solution of microprocessor driven by brushless DC motor:

Microprocessor solution for brushless DC motor drive based on NXP lpc1500

Can module realizes industrial connectivity while USB simplifies field upgrade

Figure 3 – block diagram of NXP lpc1500 brushless DC motor drive scheme

Scheme features

·It can realize the high precision control of the combination of sensorless motor and sensorless motor, and can control two motors at the same time;

·Two 12 bit, 12 channel, 2 MSPs ADCs with 500 ns ADC conversion time and on-chip quadrature encoder interface (qei);

·Advanced simulation subsystem and high precision timing are very suitable for PID control loop;

·Four sctimer / PWM modules provide up to 28 PWM channels with an average PWM resolution of less than 1ns;

·Four fast comparators with 68 ns propagation delay support fast response over-current / over-voltage monitoring and protection;

·Interconnecting sctimer / PWM, ADC and comparator, ADC triggered by sctimer / PWM;

·72 MHz arm Cortex-M3 processor;

·Connectivity: can module realizes industrial connectivity, while USB simplifies field upgrade;

·Free FOC and BLDC motor control firmware;

·GUI Based Calibration / adjustment tool;

Can module realizes industrial connectivity while USB simplifies field upgrade

Figure 4 – photo of NXP lpc1500 brushless DC motor drive scheme

Microprocessor solution for brushless DC motor drive based on Toshiba tmpm375

Can module realizes industrial connectivity while USB simplifies field upgrade

Figure 5 – block diagram of Toshiba tmpm375 brushless DC motor drive scheme

Scheme features

·Tmpm375fsdmg is the world’s smallest vector control microcontroller;

·PMD (motor control timer): 1 channel;

·Vector engine: 1 channel;

·Encoder input: 1 channel;

·Operational amplifier: 1 channel;

·Internal oscillator (i-osc);

·Input / output port: 21 pins;

·16 bit timer: 4 channels;

·SiO / UART: 2 channels;

·I2C / SiO: 1 channel;

·12 bit AD converter: 4-channel (2 μ s) conversion time (ADC conversion clock [email protected] ));

·Power on reset circuit (POR);

·Voltage detection (vltd);

·Oscillation frequency detector (ofd);

Can module realizes industrial connectivity while USB simplifies field upgrade

Figure 6 – photo of Toshiba tmpm375 brushless DC motor drive scheme

Editor in charge: PJ

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