# US 2019/0161138 A1 · Electricity aided bicycle and auxiliary power controlling method thereof

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- Number: US 2019/0161138 A1
- Document ID: US20190161138A1
- Status: Published application
- Kind: A1
- Application number: 15/822,211
- Filed: 2017-11-27
- Published: 2019-05-30
- Earliest claimed: 2017-11-27
- Assignees: Metal Industries Research & Development Centre
- Applicants: Metal Industries Research & Development Centre
- Inventors: Chang-Ching Lin; Cheng-Yen Chen; I-Chiao Tsai
- Web page: https://patentgrep.com/patent/US20190161138A1

## CPC

- B60L 50/20: using propulsion power generated by humans or animals
- B62M 6/50: characterised by detectors or sensors, or arrangement thereof
- B60L 15/20: for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B62M 6/45: Control or actuating devices therefor
- H02P 6/17: and for generating speed information
- H02P 31/00: Arrangements for regulating or controlling electric motors not provided for in groups H02P1/00 - H02P5/00, H02P7/00 or H02P21/00 - H02P29/00
- B60L 2200/12: Bikes
- B60L 2240/427: Voltage
- Y02T 10/64: Electric machine technologies in electromobility
- Y02T 10/72: Electric energy management in electromobility
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B62M: RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR {SINGLE-TRACK} CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES (arrangements or mounting of transmissions in vehicles in general B60K; transmission elements per se F16)
- H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

An electricity aided bicycle and an auxiliary power controlling method thereof are provided. The electricity aided bicycle includes a driving circuit, a rotating speed detector and a command voltage generator. The driving circuit receives a command voltage, and drives an auxiliary motor of the electricity aided bicycle based on the command voltage. The rotating speed detector generates a detection signal having a plurality of pulses based on a rotation status of a driving gear of the electricity aided bicycle. The command voltage generator receives the detection signal, and is configured to: calculate times between two adjacent pulses in the detection signal, operate numerical value derivation operation based on the times to generate an estimated velocity value, set an electricity aid strategy table and calculate the command voltage based on the estimated velocity value and the electricity aid strategy table.

## Claims

### Claim 1

An electricity aided bicycle, comprising:
a driving circuit, receiving a command voltage and driving an auxiliary motor of the electricity aided bicycle based on the command voltage;
a rotating speed detector, generating a detection signal having a plurality of pulses based on a rotation status of a driving gear of the electricity aided bicycle; and
a command voltage generator, coupled to the rotating speed detector and the driving circuit, receiving the detection signal, and configured to:
calculate a plurality of times between two adjacent pulses in the pulses of the detection signal;
perform a numerical value derivation operation based on the times to generate an estimated velocity value;
set an electricity aid strategy table to calculate the command voltage based on the estimated velocity value and the electricity aid strategy table,
wherein the electricity aid strategy table records a relation between an electricity aid ratio and the estimated velocity value,
wherein the times comprise a first time, a second time, and a third time, the command voltage generator calculates a plurality of reciprocals of the first time, the second time, and the third time, and performs the numerical value derivation operation based on the third time and the reciprocals,
wherein the estimated velocity value is equal to
1
T
K
+
1
2

[
1
T
K
-
1
T
K
-
1
]
+
T
K
8
[
1
T
K
-
1
T
K
-
1
T
K
-
1
T
K
-
1
-
1
T
K
-
2
T
K
-
1
]
,
wherein TK is the third time, TK−1 is the second time, and TK−2 is the first time.

### Claim 2 (depends on 1)

The electricity aided bicycle as claimed in claim 1, wherein the command voltage generator sets a detection cycle and periodically detects whether each of the pulses is generated in the detection signal based on the detection cycle.

### Claim 3 (depends on 2)

The electricity aided bicycle as claimed in claim 2, wherein the detection cycle is one millisecond.

### Claim 4 (depends on 1)

The electricity aided bicycle as claimed in claim 1, wherein the command voltage generator comprises:
a processor, calculating the times, performing the numerical value derivation operation based on the times to generate the estimated velocity value, and calculating the command voltage based on the electricity aid strategy table and the estimated velocity value; and
a lookup table, coupled to the processor, storing the electricity aid strategy table, and providing the electricity aid strategy table to the processor.

### Claim 5 (depends on 4)

The electricity aided bicycle as claimed in claim 4, wherein the command voltage generator further comprises:
a filter, coupled to the processor, receiving and filtering the detection signal, and providing a filtered detection signal to the processor.

### Claim 6

(canceled)

### Claim 7

(canceled)

### Claim 8 (depends on 1)

The electricity aided bicycle as claimed in claim 1, wherein the electricity aid ratio is negatively proportional to the estimated velocity value.

### Claim 9 (depends on 1)

The electricity aided bicycle as claimed in claim 1, wherein in the electricity aid strategy table, the estimated velocity value less than a first reference velocity value corresponds to a first electricity aid ratio, the estimated velocity value between the first reference velocity value and a second reference velocity value corresponds to a second electricity aid ratio, and the estimated velocity value greater than the second reference velocity value corresponds to a third electricity aid ratio,
wherein the first reference velocity value is less than the second reference velocity value, the first electricity aid ratio is greater than the second electricity aid ratio, and the second electricity aid ratio is greater than the third electricity aid ratio.

### Claim 10 (depends on 1)

The electricity aided bicycle as claimed in claim 1, wherein the driving circuit comprises:
a multiple phase command voltage generator, coupled to the command voltage generator and generating a plurality of multiple phase command voltages; and
a driving signal generator, coupled to the multiple phase command voltage generator and generating a plurality of driving signals based on the phase command voltages to drive the auxiliary motor.

### Claim 11 (depends on 1)

The electricity aided bicycle as claimed in claim 1, wherein the driving circuit further comprises:
a voltage detector, coupled to the auxiliary motor, detecting a plurality of driving phase voltages of the auxiliary motor and generating a plurality of feedback signals; and
an operator, coupled to the multiple phase command voltage generator and the voltage detector, respectively performing an operation between the phase command voltages and the feedback signals, and providing a plurality of after-operation phase command voltages to the driving signal generator.

### Claim 12 (depends on 1)

The electricity aided bicycle as claimed in claim 1, wherein the command voltage generator is disposed on a circuit board, and the circuit board is detachably coupled to the electricity aided bicycle.

### Claim 13

An auxiliary power controlling method, adapted for an electricity aided bicycle, comprising:
receiving a command voltage and driving an auxiliary motor of the electricity aided bicycle based on the command voltage by a driving circuit;
generating a detection signal having a plurality of pulses based on a rotation status of a driving gear of the electricity aided bicycle;
calculating a plurality of times between two adjacent pulses in the pulses of the detection signal, wherein the times comprise a first time, a second time, and a third time;
performing a numerical value derivation operation based on the times to generate an estimated velocity value, comprises:
calculating a plurality of reciprocals of the first time, the second time, and the third time; and
performing the numerical value derivation operation based on the third time and the reciprocals;
setting an electricity aid strategy table to calculate the command voltage based on the estimated velocity value and the electricity aid strategy table,
wherein the electricity aid strategy table records a relation between an electricity aid ratio and the estimated velocity value,
wherein the estimated velocity value is equal to
1
T
K
+
1
2

[
1
T
K
-
1
T
K
-
1
]
+
T
K
8
[
1
T
K
-
1
T
K
-
1
T
K
-
1
T
K
-
1
-
1
T
K
-
2
T
K
-
1
]
,
wherein TK is the third time, TK−1 is the second time, and TK−2 is the first time.

### Claim 14 (depends on 13)

The auxiliary power controlling method as claimed in claim 13, wherein calculating the times between two adjacent pulses in the pulses of the detection signal comprises:
setting a detection cycle and periodically detecting whether each of the pulses is generated in the detection signal based on the detection cycle.

### Claim 15

(canceled)

### Claim 16

(canceled)

### Claim 17 (depends on 13)

The auxiliary power controlling method as claimed in claim 13, wherein the electricity aid ratio is negatively proportional to the estimated velocity value.

### Claim 18 (depends on 13)

The auxiliary power controlling method as claimed in claim 13, wherein setting the electricity aid strategy table comprises:
setting a first reference velocity value and a second reference velocity value; and
setting that the estimated velocity value less than the first reference velocity value corresponds to a first electricity aid ratio, the estimated velocity value between the first reference velocity value and the second reference velocity value corresponds to a second electricity aid ratio, and the estimated velocity value greater than the second reference velocity value corresponds to a third electricity aid ratio,
wherein the first reference velocity value is less than the second reference velocity value, the first electricity aid ratio is greater than the second electricity aid ratio, and the second electricity aid ratio is greater than the third electricity aid ratio.