Direct drive stacked motor acuator
AssigneeElectro-Motor Dynamics, LLC
InventorSiamak Atar
Life of this patent
Estimating the term…
Abstract
A motor actuator includes multiple rotors and stators arranged in an alternating configuration. Each rotor is located between two adjacent stators. Each rotor includes magnets assembled on a shaft. The stators are secured to a housing, and each stator has multiple coils embedded as traces within a printed circuit board (PCB). The motor actuator can function as a stepper motor, a continuous BLDC motor, a rotary absolute position encoder, an electricity generator, and a continuous torque meter in a single unit. A stacked configuration for the PCB motor results in a compact design, high torque output, low weight, and high efficiency.
Claims21
A motor actuator comprising:
- a plurality of rotors, each rotor in said plurality of rotors including a plurality of magnets assembled on a shaft;
- a plurality of stators secured to a housing, each stator in said plurality of stators including a plurality of coils embedded as traces within a printed circuit board (PCB);
- wherein the rotors and stators are arranged in an alternating configuration with each rotor located between two adjacent stators.
An apparatus comprising:
- at least one rotor, each rotor including a plurality of magnets assembled on a shaft;
- at least one stator secured to a housing, each stator including a plurality of coils, wherein the plurality of coils of each stator includes sets of coils associated with respective phases of application of current to the coils, wherein the coils in each set are electrically coupled in parallel to one another.
A direct drive motor actuator comprising:
- at least one rotor, each rotor including a plurality of magnets assembled on a shaft;
- at least one stator secured to a housing, each stator including a plurality of coils;
- a positioning magnet located within the shaft;
- and
- a control circuit board including:
- a magnetic sensor configured to measure an angular orientation of the shaft based on a magnetic field of the positioning magnet,
- a processor configured to process a signal received from the magnetic sensor and measure an angular speed of the shaft, and
- control circuitry configured to transmit the measured angular speed via a communications port.
Dependencies are inferred from the claim text.