What is a permanent magnet synchronous motor?

In PMSM and BLDCM, the rotor is made of permanent magnets such as neodymium-iron-boron alloy (NdFeB) and thus avoids rotor field winding. The interior permanent magnet synchronous motor supplied by a six-step inverter with electronic commutation is used as variable speed drive in pumps and fans .

What are permanent magnet brushless DC motors used for?

Permanent magnet brushless DC motors are used in laser printers, hard disc drives and electric vehicles [2, 27]. Electronic switching of the six-step inverter is controlled by the rotor position which is sensed by using either the optical or the Hall effect sensors [2, 3, 4, 5].

How do inverter motors work?

These motors are inverter driven and require sensing of rotor position information to generate gate pulse for the inverter to rotate the rotor in the forward direction. The sensing of rotor position can be using sensors which work on Hall effect, phototransistors and disc encoders.

How does a permanent magnet synchronous machine work?

The three-phase output voltage of this inverter is fed to the Permanent Magnet Synchronous Machine model from specialised technology block set. To this machine model, an external step load of 0.5 Nw-M for the first 2 seconds and 0.25 Nw-M for the remaining time is applied. Machine parameters shown in Table 7.2 are used.

What is the rotor speed of SVPWM inverter?

The mean rotor speed is 52.2 mech rad/sec which is very close to the set point speed of 54.140 mech rad/sec. The steady state stator current in Fig. 7.20 is close to 0.99 amps as recorded in Table 7.4. Also from Fig. 7.21, the line to line output voltage of three-phase SVPWM inverter is 24.14 volts (RMS) and the frequency is 16.824 Hz.

What is the line to line output voltage of SVPWM inverter?

Also from Fig. 7.21, the line to line output voltage of three-phase SVPWM inverter is 24.14 volts (RMS) and the frequency is 16.824 Hz. Converting the rotor set point speed of 54.140 mech rad/sec to electrical frequency, this value is 17.233 Hz which closely agrees with the frequency of the line to line output voltage of inverter.