Design and implementation of an electromagnetic clutch system for hub motors

Yu, Weiguang; Gu, Chenglin

doi:10.1109/icems.2014.7013667

Cited by 4 publications

(8 citation statements)

References 2 publications

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“…Assuming that the acceleration of the moving push rod is a(t), the vertical motion requirement can be written as follows at () * tdt . R 1 + R 2 (10) If the pulse current in the coil is larger than required in any point of the half slide block's stroke, the clutch can move successfully and finally maintains the constant output. It means that the current is not needed when the push rod moves longer than half of the stroke.…”

Section: Speed Requirement For Dynamic Connectionmentioning

confidence: 99%

“…where K is a constant value under the conditions of the same clutch parameters and the same d. Combining (10) and (15), the vertical motion requirement (10) can be expressed as…”

Section: Speed Requirement For Dynamic Connectionmentioning

confidence: 99%

“…The formula of the electromagnetic force could be derived as follows [10]

F ()(, t) = F_{A} + F_{R} = \frac{1}{2 μ_{0}} {(][, C_{m} B_{r} + C_{i} i ()(, t))}^{2} + C_{m i} B_{normalr} i (t)

In (2),

F_{A}

is the electromagnetic force at the left side of the slide block,

F_{R}

is the electromagnetic force at the right side,

μ_{0}

is the permeability of vacuum,

B_{r}

is the coercivity of the PM,

i false(t false)

is the current flowing in the coil. Besides,

C_{m}

C_{i}

and

C_{m i}

are variables of the air gap

δ

.…”

Section: System Analysis and Designmentioning

confidence: 99%

“…To solve the above problems, a novel permanent magnet bistable electromagnetic clutch (PMBEC) is proposed to apply specially in in-wheel hub motor vehicles [10,11]. The clutch only requires pulse current when it works and could maintain constant output without energy dissipation when the action is accomplished.…”

Section: Introductionmentioning

confidence: 99%

“…The clutch only requires pulse current when it works and could maintain constant output without energy dissipation when the action is accomplished. Paper [10] verifies the effectiveness of the pulse power supply in the clutch's application considering the relationship between the stroke and the current of the PMBEC. The optimal design of the clutch structure is presented by researching the permanent magnet (PM) leakage flux coefficient in paper [11].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic analysis of a novel clutch system for in‐wheel motor drive electric vehicles

2017

IET Electric Power Applications

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In-wheel motor drive electric vehicles mainly adopt fastening connection between hub and motor, so the electromagnetic impact and the mechanical impact are inevitable. The electromagnetic impact endangers the battery and the control system and the mechanical impact brings bad driving experience. Newly designed bistable electromagnetic clutches are embedded into the hub motor to realise flexible connection and avoid the impact. The goal of this study is to analyse the dynamic movement process of the clutch in order to achieve reliable torque transmission. The dynamic differential equations of the clutch coupled with the pulse power supply are presented. By using the dynamic analysis, the critical situation of the engagement is discussed and the engagement speed requirement equation is provided. The displacement curves and the acceleration curves validate the dynamic analysis and the engagement experiment verifies the reliability of the whole clutch system.

show abstract

Section: Speed Requirement For Dynamic Connectionmentioning

confidence: 99%

“…where K is a constant value under the conditions of the same clutch parameters and the same d. Combining (10) and (15), the vertical motion requirement (10) can be expressed as…”

Section: Speed Requirement For Dynamic Connectionmentioning

confidence: 99%

“…The formula of the electromagnetic force could be derived as follows [10]

F ()(, t) = F_{A} + F_{R} = \frac{1}{2 μ_{0}} {(][, C_{m} B_{r} + C_{i} i ()(, t))}^{2} + C_{m i} B_{normalr} i (t)

In (2),

F_{A}

is the electromagnetic force at the left side of the slide block,

F_{R}

is the electromagnetic force at the right side,

μ_{0}

is the permeability of vacuum,

B_{r}

is the coercivity of the PM,

i false(t false)

is the current flowing in the coil. Besides,

C_{m}

C_{i}

and

C_{m i}

are variables of the air gap

δ

.…”

Section: System Analysis and Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dynamic analysis of a novel clutch system for in‐wheel motor drive electric vehicles

2017

IET Electric Power Applications

Self Cite

View full text Add to dashboard Cite

show abstract

Design of a bistable electromagnetic coupling mechanism for underactuated manipulators

Kaluarachchi

Yahya

et al. 2018

Smart Mater. Struct.

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Electromagnetic clutches have been widely used in underactuated lightweight manipulator designs as a coupling mechanism due to their advantages of fast activation and electrical controllability. However, an electromagnetic clutch consumes electrical energy continuously during its operation. Furthermore, conventional electromagnetic clutches are not fail-safe in unexpected power failure conditions. These factors have a significant impact on the energy efficiency and the safety of the design, and these are vital aspects for underactuated lightweight manipulators. This paper introduces a bistable electromagnetic coupling mechanism design, with reduced energy consumption and with a fail-safe mechanism. The concept of a bistable electromagnetic mechanism consists of an electromagnet with two permanent magnets. The design has the capability to maintain stable mechanism states, either engaged or disengaged, without a continuous electrical power supply, thus enhancing fail-safety and efficiency. Moreover, the design incorporates the advantages of conventional electromagnetic clutches such as rapid activation and electrical controllability. The experimental results highlight the effectiveness of the proposed mechanism in reducing electric energy consumption. Besides this, a theoretical model is developed and a good correlation is achieved between the theoretical and experimental results. The reduced electric energy consumption and fail-safe design make the bistable electromagnetic mechanism a promising concept for underactuated lightweight manipulators.

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Design and test of electronic controlled flexible clutch system for public transportation vehicles

Geng

Chen

et al. 2017

2017 Chinese Automation Congress (CAC)

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Design and implementation of an electromagnetic clutch system for hub motors

Cited by 4 publications

References 2 publications

Dynamic analysis of a novel clutch system for in‐wheel motor drive electric vehicles

Dynamic analysis of a novel clutch system for in‐wheel motor drive electric vehicles

Design of a bistable electromagnetic coupling mechanism for underactuated manipulators

Design and test of electronic controlled flexible clutch system for public transportation vehicles

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