Stator assembly, reaction wheel, and control method thereof

Abstract

A stator assembly, a reaction wheel, and a control method thereof are disclosed. The stator assembly includes a base plate and multiple windings arranged on the base plate. Each winding has a circuit connection portion, a folded printed circuit board, and a conductor coil. The circuit connection portion is disposed on the base plate, and the folded printed circuit board is mounted on the circuit connection portion. The conductor coil is arranged on multiple folded surfaces of the folded printed circuit board. The folded printed circuit board employs a multi-layer wiring and folded structure design, which can overcome the problems of space constraints and insufficient conductor cross-sectional area faced by traditional circuit board windings in radial flux applications.

Claims

1. A reaction wheel, comprising: a base; a stator assembly disposed on the base, the stator assembly including a substrate and a plurality of windings arranged on the substrate, wherein each winding has a circuit connection portion, a folded printed circuit board and a conductor coil, the circuit connection portion being disposed on the substrate, the folded printed circuit board being mounted on the circuit connection portion, and the conductor coil being arranged on a plurality of folded surfaces of the folded printed circuit board; and a rotor assembly pivotally connected to the base and movable relative to the stator assembly, the rotor assembly including a first rotor structure disposed on a first side of the stator assembly, and the first rotor structure having a first support and a plurality of first magnets, the plurality of first magnets being arranged around the first support.

2. The reaction wheel as claimed in claim 1, wherein the reaction wheel further includes a heat sink mounted on the substrate and sleeved on the winding, the heat sink being configured to fix the winding.

3. The reaction wheel as claimed in claim 1, wherein the first rotor structure further has a first back iron, the first back iron being disposed around the first support, and the first back iron being located on a remote side of the first support away from the stator assembly.

4. The reaction wheel as described in claim 1, wherein the first rotor structure further comprises a first positioning pin disposed on an upper surface of the first support.

5. The reaction wheel as claimed in claim 1, wherein the rotor assembly further includes a second rotor structure disposed on a second side of the stator assembly, an air gap is formed between the first rotor structure and the second rotor structure for accommodating the plurality of windings, and the second rotor structure has a second support and a plurality of second magnets, the plurality of second magnets being arranged around the second support.

6. The reaction wheel as claimed in claim 5, wherein the rotor assembly further includes a housing, the housing including a first inner annular surface and a second inner annular surface, the first rotor structure being disposed on the first inner annular surface and the second rotor structure being disposed on the second inner annular surface.

7. A stator assembly comprising: a substrate; and a plurality of windings arranged on the substrate, wherein each winding has a circuit connection portion, a folded printed circuit board, and a conductor coil, the circuit connection portion being disposed on the substrate, the folded printed circuit board being mounted on the circuit connection portion, and the conductor coil being arranged on a plurality of folded surfaces of the folded printed circuit board.

8. The stator assembly as claimed in claim 7, wherein the conductor coil of at least one folded surface of the folded printed circuit board is wound with a number of turns.

9. The stator assembly as claimed in claim 7, wherein the conductor coils of two adjacent folded surfaces have a bend.

10. The stator assembly as claimed in claim 7, wherein each winding circuit connection has a slot and each folded surface has an insertion portion configured to be inserted into the corresponding slot.

11. A control method for a reaction wheel, executed by a processor, the control method comprising: setting a load torque and a target speed for a rotor assembly of a reaction wheel; determining a maximum rotational speed of the rotor assembly based on the load torque, according to a plurality of windings of a stator assembly of the reaction wheel in a current conducting state; and determining based on the target speed and the maximum rotational speed, comprising: maintaining the current conducting state in response to the target speed being less than or equal to the maximum rotational speed; and operating the rotor assembly to disconnect at least one winding of the plurality of windings at a proportion of the maximum rotational speed in response to the target speed being greater than the maximum rotational speed, thereby maintaining the load torque and increasing the rotational speed of the rotor assembly.

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