Power-supply-free external LED light structure of hub motor

Abstract

The utility model discloses a power-supply-free external LED light structure of a hub motor. The hub motor comprises a stator shaft, a stator winding, a permanent magnet rotor, a shell, a metal stator sheet, a metal rotor sheet and an LED light-emitting unit. The LED light-emitting unit is fixed outside the shell; the metal stator plate corresponds to the metal rotor plate, so that alternating current can be transmitted between the metal stator plate and the metal rotor plate; the metal stator is synchronous with the stator winding; the metal rotor is synchronous with the shell; according to the utility model, the mechanical energy of the motor can be converted into electric energy to supply power to the LED lighting system, and the external power supply is not needed; the power connector is arranged in the motor, so that the waterproof problem is effectively solved.

Description

Technical Field

[0001] The utility model belongs to the field of wheel hub motors. Background Art

[0002] When the means of transportation can meet the normal riding needs, the market began to consider making transportation life better, and the LED lighting system installed on the wheel came into being. The lighting system on the market is powered by dry batteries. During the application process, the dry batteries need to be frequently replaced or charged, and waterproofing also has certain safety risks. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a hub motor without power supply and external LED lighting structure. The utility model can convert the mechanical energy of the motor into electrical energy to power the LED lighting system without the need for external power supply.

[0004] Technical solution: To achieve the above purpose, the hub motor has no power supply and is connected to an LED lighting structure. The hub motor includes a stator winding, a permanent magnet rotor, a housing, a metal stator, a metal rotor and an LED light-emitting unit.

[0005] The metal stator is synchronized with the stator winding; the metal rotor is synchronized with the housing; alternating current can be transmitted between the metal stator and the metal rotor;

[0006] There is an independent induction coil on the stator winding; one end of the induction coil is electrically connected to the metal stator through the lead wire a, and the metal rotor is electrically connected to one end of the lead wire b;

[0007] The b lead wire passes through the threading hole on the shell to the outside of the shell, and is electrically connected to the LED light-emitting unit through the rectifier circuit.

[0008] Furthermore, the stator winding is coaxially fixed outside the stator shaft; the permanent magnet rotor is coaxially fixed inside the housing and coaxially rotates on the outer ring or inner ring of the stator winding; the two ends of the housing are rotatably matched with the stator shaft through bearings.

[0009] Furthermore, the stator winding, the permanent magnet rotor, the metal stator and the metal rotor are all wrapped inside the shell.

[0010] Furthermore, a tire is coaxially fixedly mounted on the outer ring of the housing.

[0011] Furthermore, the winding harness led out of the stator winding passes through the threading channel on the stator shaft and is electrically connected to the motor controller. The motor controller supplies power to the stator winding through the winding harness, thereby driving the permanent magnet rotor to rotate.

[0012] Furthermore, one end and the other end of the independent induction coil are electrically connected to the stator shaft, and the stator shaft is electrically grounded.

[0013] Furthermore, the metal stator and the metal rotor are arranged in parallel with each other at a distance, and the metal stator and the metal rotor together form a "capacitor" structure to transmit alternating current.

[0014] Beneficial effects: The utility model can convert the mechanical energy of the motor into electrical energy to power the LED lighting system without the need for external power supply; the power connector is arranged inside the motor, which effectively solves the waterproof problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 This is a simplified structural diagram of this scheme;

[0016] Attached Figure 2 This is the rectifier circuit diagram. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] As attached Figure 1 and 2 The hub motor shown has no power supply and an external LED lighting structure. The hub motor includes a stator shaft 9 , a stator winding 2 , a permanent magnet rotor, a housing 4 , a metal stator 6 , a metal rotor 7 and an LED light-emitting unit 13 .

[0019] The stator winding 2 is coaxially fixed to the outside of the stator shaft 9; the permanent magnet rotor is coaxially fixed to the inner wall of the shell 4, and coaxially rotates on the outer ring or inner ring of the stator winding 2; the two end axes of the shell 4 are rotatably matched with the stator shaft 9 through bearings; the metal stator 6 corresponds to the metal rotor 7, so that alternating current can be transmitted between the metal stator 6 and the metal rotor 7; the metal stator 6 and the stator winding 2 are synchronously fixedly connected through an insulating bracket; the metal rotor 7 and the shell 4 are synchronously fixedly connected through an insulating bracket.

[0020] The overall structure and wiring method of the stator winding 2 are the same as those of the conventional stator winding, with the difference that: there is an independent induction coil on the stator winding 2, and the induction coil is not electrically connected to the winding harness 8; one end of the induction coil is electrically connected to the metal stator 6 through a lead wire 5, and the other end is electrically connected to the stator shaft 9, and the stator shaft 9 is electrically grounded.

[0021] The metal rotating piece 7 is electrically connected to one end of the b lead wire 3, and the b lead wire 3 passes through the threading hole on the shell 4 to the outside of the shell 4; the b lead wire 3 converts the alternating current into direct current through the rectifier circuit, and outputs it to the LED light-emitting unit 13 fixedly arranged outside the shell 4, so that the LED light-emitting unit 13 emits light.

[0022] The stator winding 2, the permanent magnet rotor, the metal stator 6 and the metal rotor 7 are all wrapped inside the housing 4, thereby achieving waterproof and protective performance.

[0023] A tire is coaxially fixedly mounted on the outer ring of the housing 4. In this case, the stator shaft 9 and the housing 4 are both made of metal. At the same time, since the stator shaft 9 is electrically connected to the housing 4 itself through the bearing, the stator shaft 9 and the housing 4 are recorded as "grounded" in this case. All "grounding" recorded in the following text refers to the electrical connection between the stator shaft 9 and the housing 4.

[0024] The winding harness 8 led out from the stator winding 2 passes through the threading channel on the stator shaft 9 and is electrically connected to the motor controller. The motor controller supplies power to the stator winding 2 through the winding harness 8, thereby driving the permanent magnet rotor to rotate.

[0025] During operation, the motor controller energizes the stator winding 2 through the winding harness 8, thereby driving the permanent magnet rotor to rotate. During the continuous rotation of the permanent magnet rotor, the magnetic field generated by several permanent magnets on the permanent magnet rotor rotates synchronously with the permanent magnet rotor, so that an independent induction coil on the stator winding 2 that is not connected to the winding harness 8 continuously cuts the magnetic flux lines to generate alternating current.

[0026] In the first embodiment: the metal stator 6 and the metal rotor 7 are electrically slidably matched via brushes, and there is no capacitive reactance, but there is wear and noise.

[0027] In the second embodiment: the metal stator 6 and the metal rotor 7 are arranged in parallel with each other and are both metal ring bodies coaxial with the stator shaft 9. The actual distance between the two is less than 2 mm. The metal stator 6 and the metal rotor 7 together form a "capacitor" structure to transmit alternating current. There is a certain capacitive reactance loss, but there is no contact and no wear problem.

[0028] The rectifier circuit includes a boost transformer, a rectifier bridge circuit 10 and a DC-DC chip.

[0029] The step-up transformer includes a primary winding T1 and a secondary winding T2 . One end of the primary winding T1 is grounded, and the other end is electrically connected to the metal rotor 7 .

[0030] The rectifier bridge circuit 10 includes a U1 diode, a U2 diode, a U3 diode and a U4 diode; the positive electrode of the U1 diode is electrically connected to the positive electrode of the U3 diode, the negative electrode of the U3 diode is electrically connected to the positive electrode of the U4 diode, the negative electrode of the U4 diode is electrically connected to the negative electrode of the U2 diode, and the positive electrode of the U2 diode is electrically connected to the negative electrode of the U1 diode; the secondary winding T2; the two ends are electrically connected to the positive electrode of the U2 diode and the positive electrode of the U4 diode respectively; and also includes a C1 capacitor, a C2 capacitor, a C3 capacitor, a C4 capacitor, a C5 capacitor, a C6 capacitor, an L inductor, an R1 resistor and an R2 resistor; the C1 capacitor and the C2 capacitor are connected in parallel to form a capacitor group, and one end of the parallel structure formed by the C1 capacitor and the C2 capacitor is electrically connected The cathode of the diode U2 is connected, and the other end is electrically connected to the anode of the diode U3 and grounded; the DC-DC chip includes a BS pin, a SW pin, an IN pin and a FB pin; the two ends of the capacitor C5 are electrically connected to the BS pin and the SW pin respectively; one end of the capacitor C3 is grounded, and the other end is electrically connected to the IN pin and the cathode of the diode U4 at the same time; one end of the resistor R1, the resistor R2 and the capacitor C6 are electrically connected to the FB pin together, the other ends of the resistor R1 and the capacitor C6 are electrically connected to the SW pin together, and the other end of the resistor R2 is grounded; the capacitor C4 is connected in parallel with the LED light-emitting unit 13, and one end of the capacitor C4 is grounded (electrically connected to the housing 4), and the other end is electrically connected to the SW pin through the L inductor.

[0031] The working principle of this case is as follows: except for an independent induction coil on the stator winding 2 that is not electrically connected to the winding harness 8, the motor controller energizes each coil on the stator winding 2 through the winding harness 8 and generates a magnetic field, thereby driving the permanent magnet rotor to rotate. During the continuous rotation of the permanent magnet rotor, the magnetic field generated by several permanent magnets on the permanent magnet rotor rotates synchronously with the permanent magnet rotor, so that an independent induction coil on the stator winding 2 that is not connected to the winding harness 8 continuously cuts the magnetic flux lines to generate alternating current; even if the stator winding 2 is not energized or does not form a driving force for the permanent magnet rotor, if the stator winding 2 rotates by inertia, rolls, or rolls and rotates on a downhill section by gravity potential energy, as long as the permanent magnet rotor rotates, an independent induction coil on the stator winding 2 that is not connected to the winding harness 8 can still generate alternating current under the action of electromagnetic induction; the alternating current generated by an independent induction coil on the stator winding 2 that is not connected to the winding harness 8 is transmitted to the electrically connected metal stator 6 through a lead wire 5. Due to the relative The rotating metal stator 6 and the metal rotor 7 together form a "capacitor" structure to transmit alternating current, so the generated alternating current is transmitted to the metal rotor 7, and then under the transmission of the b lead wire 3, the alternating current firstly increases the AC voltage through a step-up transformer to ensure the AC voltage amplitude at low speed, and then passes through the rectifier bridge, and the AC output provided by the motor becomes a unidirectional DC pulsation; after passing through the rectifier bridge, although a unidirectional DC pulsation is obtained, the DC voltage with a large amplitude cannot be directly supplied to the LED, and further filtering is required. After passing through multiple filter capacitors, the voltage amplitude is initially stabilized; the DC amplitude after the filter capacitor still needs to be further stabilized and the output power is guaranteed to be stable, so after DC-DC processing, the DC output can be further stabilized by the circuit composed of the DC-DC chip, and finally the LED light-emitting unit 13 is operated by a stable current, so that the LED light-emitting unit 13 that rotates synchronously with the shell 4 emits light, producing a light effect similar to "Hot Wheels".

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. The wheel hub motor has no power supply and is connected to an external LED light structure, which is characterized by: The wheel hub motor comprises a stator winding (2), a permanent magnet rotor, a housing (4), a metal stator (6), a metal rotor (7) and an LED light-emitting unit (13); the metal stator (6) is synchronized with the stator winding (2); the metal rotor (7) is synchronized with the housing (4); alternating current can be transmitted between the metal stator (6) and the metal rotor (7); An independent induction coil is present on the stator winding (2); one end of the induction coil is electrically connected to a metal stator (6) via an a lead wire (5), and the metal rotating plate (7) is electrically connected to one end of a b lead wire (3); the b lead wire (3) passes through a threading hole on the housing (4) to the outside of the housing (4), and is electrically connected to an LED light-emitting unit (13) via a rectifier circuit.

2. The wheel hub motor without power supply and external LED lighting structure according to claim 1 is characterized by: The stator winding (2) is coaxially fixed outside the stator shaft (9); the permanent magnet rotor is coaxially fixed inside the housing (4) and coaxially rotates on the outer ring or inner ring of the stator winding (2); the two ends of the housing (4) are rotatably matched with the stator shaft (9) through bearings.

3. The wheel hub motor without power supply and external LED lighting structure according to claim 2 is characterized by: The stator winding (2), the permanent magnet rotor, the metal stator (6) and the metal rotor (7) are all wrapped inside the housing (4).

4. The wheel hub motor without power supply and external LED lighting structure according to claim 3 is characterized by: The outer ring of the housing (4) is coaxially fixedly mounted with a tire.

5. The wheel hub motor without power supply and external LED lighting structure according to claim 4 is characterized in that: The winding harness (8) led out from the stator winding (2) passes through a threading channel on the stator shaft (9) and is electrically connected to a motor controller. The motor controller supplies power to the stator winding (2) through the winding harness (8), thereby driving the permanent magnet rotor to rotate.

6. The wheel hub motor without power supply and external LED lighting structure according to claim 5 is characterized in that: One end and the other end of the independent induction coil are electrically connected to the stator shaft (9), and the stator shaft (9) is electrically grounded.

7. The wheel hub motor without power supply and external LED lighting structure according to claim 6, characterized in that: The metal stator (6) and the metal rotating plate (7) are arranged in parallel with each other at a distance, and the metal stator (6) and the metal rotating plate (7) together form a "capacitor" structure to transmit alternating current.

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