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Electric carrier and motor braking parking method thereof

A technology for electric pallet trucks and motor braking, applied in electric vehicles, power management, control drive, etc., can solve the problem of reducing the service life of mechanical components such as gearboxes, not considering special operations such as parking on slopes, and uncontrollable vehicle movement, etc. problems, to achieve smooth parking, high parking efficiency, and reduce wear and tear

Active Publication Date: 2020-10-16
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing parking methods of electric pallet trucks do not consider special operations such as parking on slopes, and even some manufacturers directly use the motor drivers used on electric bicycles for electric pallet trucks in order to save development costs. The parking brake effect is optimized, using simple free parking or complete open-loop control methods, without considering the characteristics of heavy loads and complex use environments of electric trucks. When going uphill or downhill, the vehicle will slide downhill, seriously The slippery slope will even endanger the personal safety of the operator, and there will be uncontrollable vehicle movement; secondly, after the slippery slope occurs, when the electromagnetic brake is locked at the end, there will be a large mechanical shock and vibration due to the vehicle still running at a relatively high speed and noise, and reduce the service life of mechanical components such as gearboxes

Method used

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  • Electric carrier and motor braking parking method thereof
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Embodiment 1

[0031] The invention relates to a motor brake parking method of an electric pallet truck, which is applied to a purely motor-driven and braked electric pallet truck without mechanical braking components. The characteristics of this type of vehicle are that the rated driving power is within 1000W and the load is within 2 tons. Ordinary electric bicycle motors only provide driving force, and the brakes are completed by the mechanical part, and the brakes have a clear brake signal input. For an electric pallet truck with only an accelerator accelerator but no brake pedal, acceleration, deceleration and parking are all realized through the accelerator accelerator, and the user operates the accelerator accelerator to realize the control of the vehicle. Therefore, without considering other functions (such as emergency stop), the accelerator is the only input signal of the electric pallet truck. Since there is no direct braking signal input, the motor driver is required to control th...

Embodiment 2

[0048] An electric pallet truck, such as figure 2 As shown, including: motor driver, electric motor, electromagnetic brake and accelerator;

[0049] Wherein, the motor driver controls the motor and the electromagnetic brake through an electrical connection. Specifically, the output terminals of the motor driver are respectively connected with the input terminals of the motor and the electromagnetic brake, and the output terminals of the motor and the accelerator are connected with the input terminals of the motor driver. connected;

[0050] The motor driver is used to execute the motor brake parking method proposed in Embodiment 1 of the present invention when the release signal or emergency stop signal fed back by the accelerator accelerator is detected.

[0051] Specifically, in this embodiment, the motor driver is installed at a fixed position of the electric pallet truck. This position generally has the characteristics of certain waterproof, dustproof and good heat dissi...

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Abstract

The invention discloses an electric carrier and a motor braking parking method thereof. The state information of the electric carrier is analyzed when the electric carrier is parked on a flat ground and a slope, and heuristic rules of stable parking of the electric carrier are determined; and after it is determined that an electric carrier operator has a parking intention according to a signal fedback by an accelerator, a proper braking method can be selected according to the state information of the electric carrier in combination with the heuristic rules, the braking torque is adjusted in real time, and an electromagnetic band-type brake is controlled, so that the vehicle can be stably parked on the flat ground or the slope. In addition, the electric carrier disclosed by the invention comprises a motor driver, a motor, the electromagnetic band-type brake and the accelerator, wherein the motor not only provides driving force, but also provides braking force required by braking parking, the motor driver can realize seamless switching between a driving state and a braking state, and energy fed back during regenerative braking can charge the power battery, so that the endurance timeof the vehicle is prolonged.

Description

technical field [0001] The invention belongs to the technical field of motor drive, and more specifically relates to an electric transport vehicle and a method for braking and parking the electric vehicle. Background technique [0002] In recent years, electric pallet trucks have gradually replaced manual pallet trucks, appearing in logistics, factories and large supermarkets, etc., greatly improving the efficiency of cargo delivery and saving manpower and time. The driving power of the electric pallet truck comes from the electric motor, and there are two types of motors generally used in this occasion: brushed DC motor and brushless DC motor. At present, brushed DC motors have been developed for a long time and the technology is mature. There are a large number of electric pallet trucks driven by brushed motors in the market; brushless DC motors are in a stage of rapid development, because of their brushless structure, long life and maintenance-free And other outstanding ...

Claims

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Application Information

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IPC IPC(8): B60L15/20
CPCB60L15/2009B60L15/2018B60L2240/10B60L2240/642Y02T10/72
Inventor 李培鹤沈安文罗欣
Owner HUAZHONG UNIV OF SCI & TECH
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