A control system and method for frequency conversion to power frequency conversion of a bridge maintenance vehicle
A bridge maintenance vehicle and control system technology, applied in control systems, bridges, bridge construction, etc., can solve the problems of maintenance personnel being trapped, not used for a long time, failures, etc., to achieve the effect of providing diversity and avoiding personnel retention
Active Publication Date: 2021-01-19
重庆红岩建设机械制造有限责任公司
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Problems solved by technology
Since the overhaul vehicle works outdoors and the interval between use is long, the frequency converter is easily affected by outdoor dust, humidity and long-term non-use, resulting in failure
Since the maintenance vehicle is a manned operation equipment, it is easy to cause the maintenance personnel to be trapped when a failure occurs
Method used
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[0034] The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only used to illustrate the basic idea of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.
[0035] Among them, the accompanying drawings are only used for exemplary description, and represent only schematic diagrams, not physical drawings, and should not be ...
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The invention relates to a variable-frequency-to-power-frequency control system and method for a bridge maintenance vehicle, and belongs to the field of bridge safety detection. The system comprises a variable frequency control system and a power frequency control system. The variable frequency control system comprises a power supply input, a deviation correction system, a frequency converter, a controller PLC, a contactor, a circuit breaker, a selection switch, an intermediate relay control button, a stroke switch and a sensor. The power frequency control system comprises a power supply input, a manual correction button, a selection switch, a contactor and a circuit breaker. The power supply input supplies power to a generator or a power battery. The deviation correction system comprises a controller PLC, an encoder, a frequency converter and a stroke switch. Free conversion of power / variable frequency is realized and diversity of control is provided. A new solution is provided for the movement of the maintenance vehicle in emergency, and the situation of personnel retention due to the frequency conversion failure of the maintenance vehicle can be avoided.
Description
technical field [0001] The invention belongs to the field of bridge safety detection, and relates to a control system and method for converting frequency conversion to power frequency of a bridge maintenance vehicle. Background technique [0002] For the control system of the bridge maintenance vehicle, there are generally two control methods: 1. The power frequency control method, the motor of the maintenance vehicle is mainly driven by the power frequency, which is prone to unstable operation during the driving process, and the left and right drive motors of the truss run asynchronously. There is an error in the walking of the maintenance vehicle. This control method is often used in systems with short truss lengths and no automatic deviation correction; 2. Frequency conversion drive mode, the motor of the maintenance vehicle is controlled by the frequency converter to drive the motor, which can realize the stepless speed regulation of the maintenance vehicle, so that the ...
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IPC IPC(8): H02P27/00H02P27/04H02P5/50E01D19/10
CPCE01D19/106H02P5/50H02P27/00H02P27/04
Inventor 袁肆淩胥俊陈川
Owner 重庆红岩建设机械制造有限责任公司