Brushless DC motor and manufacturing method thereof
AssigneeNidec Corporation
InventorsTatsuhisa Fujii, Tomotaka Yonemitsu, Norihide Watari
Life of this patent
Estimating the term…
Abstract
A brushless DC motor includes an embedded memory of a micro computer mounted on a circuit board which can be modified during and/or after a manufacturing process of the brushless DC motor. The circuit board installed on the brushless DC motor includes an IC having the embedded micro computer executing feed back control of the pulse wide modulation and the embedded memory for storing data such as control programs. The circuit board also includes a writing terminal port to which an external memory writer is to be connected. Data is transferred from the external memory writer and stored in the embedded memory by contacting the writing terminal port with a tip end portion of a cable from the external memory writer.
Claims12
A brushless DC motor comprising:
- a rotor portion rotatable about a center axis and including a magnet;
- a stationary portion including an armature facing the magnet, the armature defined by a wire wound around a stator core;
- a bearing rotatably supporting the rotor portion relative to the stationary portion;
- a base portion;
- a circuit board connected to and facing the armature;
- a rotation control portion provided on the circuit board and including a non-volatile rewritable memory arranged to control the rotation of the rotor portion based on data stored in the non-volatile rewritable memory;
- a driving circuit provided on the circuit board and arranged to provide driving current controlled by the rotation-control portion;
- and
- a writing terminal port provided on the circuit board and arranged to be detachably connected to an external memory writer;
- wherein
- the circuit board is axially arranged between the armature and the base portion;
- and
- the writing terminal port is arranged on a side of the circuit board facing the base portion, the base portion includes a writing opening, and the writing terminal port is arranged to be detachably connected to the external memory writer via the writing opening.
Dependencies are inferred from the claim text.