Variable speed electric hoist

Variable speed electric hoist core variable frequency drive module utilizes Infineon IGBT power devices with adaptive PID algorithms, enabling infinitely variable speed control from 0.1-20 m/min with speed fluctuation within ±1%. When approaching target positions, the system automatically switches to 0.1 m/min micro-speed mode, integrating gyroscopic anti-sway algorithms to achieve ±5mm positioning accuracy for delicate equipment assembly, eliminating installation accidents caused by load swinging.

Weihua variable speed drive technology

• 1. Precise speed control: 0.1-20 m/min stepless speed regulation, supporting millimeter-level positioning accuracy (±5mm).
• 2. Soft start-stop protection: eliminates mechanical impact and extends the life of the wire rope/chain by 300%+.
• 3. Adaptive load response: Real-time matching of motor torque, speed increase by 30% under light load, and rock-solid stability under heavy load.

Variable speed electric hoist parameters

Parameter	Standard value range	Customizable options
Rated load	0.5-100 tons	Up to 200 tons
Lifting speed	Frequency conversion 0.1-20 m/min	Two-speed/multi-speed switching
Job level	FEM 3m / ISO M6	Up to M8
Motor power	1.5-30 kW	IP55/IP65 protection
Speed ​​regulation accuracy	±1% of setting value	Optional ±0.5% high precision version
Control method	Remote control + PLC + Internet of Things IO	Support PROFINET communication
Overheating protection	Real-time temperature monitoring + automatic load reduction	–
Noise level	≤65dB(A)@1m	Silent mode ≤58 dB

Key Performance Parameters

Load-Speed Profile

Load Ratio	100% Rated	60% Rated	30% Rated
Speed Range	0.1-8 m/min	0.1-12 m/min	0.1-20 m/min

Energy Efficiency Data (10-ton model)

Condition	Traditional Hoist	Weihua VFD Hoist	Savings
Single Lift (10m)	1.8 kW·h	1.2 kW·h	33%
Standby (24h)	0.5 kW·h	0.15 kW·h	70%

Customized solutions for the variable speed electric hoist industry

• 1. Explosion-proof type: ATEX/IECEx certification (Ex db IIC T4).
• 2. Low temperature type: normal operation in extremely cold environment of -40℃.
• 3. Clean room version: silicone-free design + stainless steel shell (ISO Class 5).

Extreme Condition Adaptability

Addressing demanding industrial environments, Weihua’s proprietary 4D Dynamic Load Response System delivers:

• Light-Load Efficiency Mode: Automatically increases motor speed to 130% of rated value when sensors detect <30% load ratio, reducing empty hook transit time.

• Heavy-Load Stability Mode: Activates torque compensation at >80% load, smoothly boosting motor output to 115% to prevent traditional hoists’ “step-type” overload tripping.

• Hazardous Sway Control: Configurable S-curve acceleration/deceleration (0.1-0.3 m/s²) via HMI suppresses liquid sloshing forces during chemical transfer, reducing spill risks by 90%.

• Multi-Hoist Synchronization: Industrial CAN bus architecture synchronizes up to 32 hoists with <1% speed deviation for millimeter-level alignment of large components.

Optimizing the life cycle cost of variable speed electric hoist

► Hardware Durability Innovations

• Dual Braking Redundancy: Primary normally-closed electromagnetic disc brake (response ≤20ms) + secondary mechanical centrifugal emergency brake + laser tachometer, complying with EN 13157 safety standards.

• G80 Alloy Hooks: Forged under 12,000-ton hydraulic press with self-locking safety latches, 300% safety factor.

• Permanent-Sealed Drive System: Labyrinth-sealed gearbox with synthetic hydrocarbon grease enables 50,000-hour maintenance-free operation.

► Smart Predictive Maintenance

Embedded Weihua SmartLift® IoT module utilizes vibration sensors + current ripple analysis for:

• Bearing wear alerts (500-hour advance warning)

• Brake pad thickness monitoring (0.1mm precision)

• Wire rope micro-deformation detection (AI image comparison)
  Real-time equipment health indices via mobile APP reduce annual maintenance costs by 40%.

Variable speed electric hoist intelligent scene application

Scene	Pain points of traditional gourds	Weihua frequency conversion solution
Precision assembly line	Positioning shakes, lack of accuracy	Low speed mode (0.1 m/min) + anti-sway algorithm
High-hazardous chemical handling	Start and stop liquid splashing	S-curve acceleration and deceleration, the acceleration can be adjusted to 0.1m/s²
Multi-machine collaborative operation	Speed ​​out of sync	CAN bus synchronous control, group error <1%
Energy sensitive factory	High energy consumption in standby	Sleep mode power consumption ≤15W (70% energy saving)

Global Success Cases

Case 1: EV Battery Production Line

A German automaker deployed 32× WH-VSE-5T variable speed electric hoists in automated module handling:

✓ ±3mm positioning accuracy

✓ 22% faster cycle time

✓ Zero failures in 2 years

Case 2: Nuclear Fuel Processing

Explosion-proof electric hoist (Ex db IIC T4) in radiation zones:

✓ S-curve acceleration eliminating hazardous sway

✓ 200m remote control range

✓ Achieved 10-year maintenance-free design