MOTOR CONTROL DEVICE AND MAGNETIC POLE POSITION ESTIMATION METHOD
摘要
<p>It is possible to provide a motor control device and a magnetic pole position estimation method which can estimate a magnetic pole position even when a large friction or a large load is present and are not affected by a motor cogging torque or an external turbulence. The motor control device includes a magnetic pole position estimation unit (9) having: a low-accuracy magnetic pole position estimation unit (22) which generates a rough first estimation magnetic pole position in the order of 10 degrees; a high-accuracy magnetic pole position estimation unit (23) which generates an accurate second estimation magnetic pole position in the order of 1 degree; an estimated magnetic pole position selection unit (24) which selects the first estimation magnetic pole position or the second estimation magnetic pole position; and a speed instruction automatic generation unit (21) which generates a speed instruction for estimating a magnetic pole position.</p>
