Electric Tool Variable Motor Speed for Hydraulic Pressure
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Solution Overview
Problem
Hydraulic electric tools face inefficiencies in pressure raising due to high viscosity hydraulic oil at low temperatures, leading to inadequate oil feeding and prolonged pressure raising times.
Innovation Solution
An electric tool configuration that includes a control circuit to adjust the rotation speed of the electric motor based on the detected state of the hydraulic oil, such as temperature and viscosity, ensuring efficient oil feeding and pressure raising.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rotation speed of the electric motor is increased to improve productivity, then the pressure raising speed is improved, but the hydraulic oil cannot be fed in accordance with the liquid feeding operation when the viscosity is high
Solution Approach 1:
The electric motor's rotation speed is made variable rather than fixed. The control circuit dynamically adjusts the rotation speed based on real-time detection of hydraulic oil temperature and viscosity, allowing the system to adapt to changing fluid conditions and maintain reliable liquid feeding operation across different environmental conditions.
Solution Approach 2:
A sensor detects the state of the hydraulic oil (temperature and viscosity) and provides feedback to the control circuit. The control circuit uses this feedback information to adjust the electric motor's rotation speed, creating a closed-loop control system that ensures proper liquid feeding operation while optimizing pressure raising speed.
2Loss of time
If the rotation speed of the electric motor is increased to shorten pressure raising time, then the productivity is improved, but the battery life is reduced due to higher energy consumption
Solution Approach 1:
The system changes the operating parameters (rotation speed) based on detected conditions. When hydraulic oil temperature is low or viscosity is high, the control circuit reduces the rotation speed to prevent energy waste and battery overheating, while still achieving acceptable pressure raising times. This optimized parameter adjustment balances speed and energy consumption.
Data Source
AI summary
An electric tool configured to be capable of efficiently raise a pressure. The electric tool having a body part in which a cylinder part, an oil tank, a hydraulic pump that feeds hydraulic oil to the cylinder part, an electric motor that drives the hydraulic pump, and a control circuit are arranged; a tool head actuated by a piston in a state of being connected to the body part, a battery that supplies power to the electric motor, and a sensor that detects the state of the hydraulic oil, the control circuit being configured so as to control driving of the electric motor based on a detection signal from the sensor.