(1) The price is cheap. The driver algorithm is simple, the development difficulty is low, the development cost is low, and the hardware cost is lower than the chord wave control cost;
(2) Acceleration and deceleration are simple and rough, similar to slamming the accelerator, but also easy to overshoot;
(3) The matching motor is simple, with low requirements for motor Hall phase, phase inductance and phase resistance;
Chord wave control features
(1) Stable operation and small torque fluctuation. Similar to servo control, the operation effect is smooth, and it is not easy to fluctuate due to load changes;
(2) More stable and reliable, with long service life. The sine wave control can avoid the impact of peak current, while the square wave control can easily generate peak current, which will impact the mos tube and motor, and easily affect the service life;
(3) Quiet, low noise. When the motor is running, the square wave control can obviously hear the "squeaking" current sound, and the chord wave control current sound is very small;
(4) High efficiency, energy saving and emission reduction. The sine wave control is more effective than the square wave control, and the current required to output the same power is lower;
(5) The algorithm is difficult and the cost is higher than that of square wave control;
04 How to choose square wave and sine wave drive
Since there are two control modes of brushless motor: sine wave and square wave, how to choose?
(1) There is no high requirement for operation effect, performance, stability and reliability, and the pursuit of low cost and selection of square wave driver;
(2) If you want to have good operation effect, high stability and reliability, mute, low power consumption and high efficiency, select the sine wave driver;
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