Electronic device for controlling a synchronous motor with permanent-magnet rotor
AssigneeFagor, S. Coop.
InventorsEduardo Beltrán de Nanclares, José M. Mitxelena Alzuri
Life of this patent
Estimating the term…
Abstract
Electronic device for controlling a synchronous motor with permanent-magnet rotor, comprising an alternating voltage current source at mains frequency connected in series with said synchronous motor (1), at least one static switch (2) connected in series with said synchronous motor (1), and an electronic circuit (3) that acts on said static switch (2). Said electronic circuit (3) determines the timing for the firing of the static switch (2) taking as reference the zero-crossing of the mains voltage (Vr) and applying a firing time (Td) starting from said reference, said firing time (Td) being obtained as a function of the position of the rotor (1A) of the motor (1) in the previous half-cycles.
Claims14
An electronic device for controlling a synchronous motor with a permanent-magnet rotor comprising:
- an alternating voltage current source at mains frequency connected in series with said synchronous motor;
- at least one static switch connected in series with said synchronous motor;
- and
- an electronic circuit acting on said static switch, wherein said electronic circuit calculates the firing instants for the static switch for each half-cycle, taking as reference the zero-crossing of the mains voltage and applying a firing time starting from said reference, said firing time being the firing time of the previous half-cycle corrected according to the position of the rotor with respect to the current flowing through the motor in the previous half-cycle.
Dependencies are inferred from the claim text.