{"id":4949,"date":"2024-01-27T12:21:03","date_gmt":"2024-01-27T11:21:03","guid":{"rendered":"https:\/\/www.servomotorsadjust.com\/resolver\/"},"modified":"2024-02-05T05:26:23","modified_gmt":"2024-02-05T04:26:23","slug":"resolver","status":"publish","type":"post","link":"https:\/\/www.servomotorsadjust.com\/en\/resolver\/","title":{"rendered":"What is a resolver and how does it work?"},"content":{"rendered":"

What is a resolver?<\/h2>\n

A resolver is an analog rotary position sensor, which can regulate speed, position or torque<\/strong> through digital impulses. <\/span><\/p>\n

The resolver consists of a stationary part called a stator and a rotating part called a rotor, which is mounted on the motor shaft.<\/span><\/p>\n

How does a resolver work?<\/h2>\n

The primary stator winding is connected to a high-frequency sinusoidal signal. This signal is transmitted to the rotor winding because the primary stator winding and the rotor winding act together as a transformer. Furthermore, we can also call the rotor winding the reference winding.<\/span><\/p>\n<\/div><\/div><\/div><\/div><\/section>

[vc_single_image image=”4865″ img_size=”full”]<\/div><\/div><\/div><\/section>

The pulsating alternating magnetic field of the rotor winding now induces an alternating voltage in the sine and cosine measurement windings. Their amplitudes, however, depend on the angular position of the rotor.<\/span><\/p>\n

If the rotor winding and the measurement winding are parallel to each other, the magnetic rotor\u2019s field passes completely through the measurement coil and therefore the induced voltage is maximum.<\/span><\/p>\n<\/div><\/div><\/div><\/div><\/section>

[vc_single_image image=”4862″ img_size=”full”]<\/div><\/div><\/div><\/section>

However, if the rotor winding and the measurement winding are at right angles to each other, no voltage will be produced.<\/span><\/p>\n

There are 1, 2, 3, 4, etc. speed resolvers. That is to say, 1 speed is 360 electrical degrees of a mechanical turn: <\/span><\/p>\n

For a 1-speed resolver, 360 electrical degrees will be 360 \u200b\u200bmechanical degrees. For a 2-speed resolver, 360 electrical degrees will be 180 mechanical degrees. This ratio of mechanical and electrical degrees will be the same for 3, 4 or 5 speeds, etc.<\/span><\/p>\n

A resolver is made up of the following wiring with its corresponding function: <\/span><\/p>\n