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Hebei Nanfeng Automobile Equipment (Group) Co.,Ltd
Phone: +86 18811334770
Tel: +86 0317 8620396
Tel: +86 010 58673556
Candy Jiao
E-mail: nh.jiao@auto-parkingheater.com
Email: nh.li@auto-parkingheater.com
Add: Room 505, Building B, Free Town Center, No.58, East Third Ring South Road, Chaoyang District, Beijing, 100022, P.R.China
Dual Source EHPS Steering Pump System
Dual Source EHPS Steering Pump System is a redundant EHPS assembly for large new energy commercial vehicles. With independent high-voltage and 24V low-voltage dual windings, it automatically switches to low-voltage emergency assist when the high-voltage system fails, effectively preventing steering loss. Featuring full electrical isolation, IP67 protection and CAN bus control, it guarantees driving safety for passenger and heavy-duty electric vehicles.
Description
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Dual Source EHPS Steering Pump System
Dual Source EHPS Steering Pump System is a redundant EHPS assembly for large new energy commercial vehicles. With independent high-voltage and 24V low-voltage dual windings, it automatically switches to low-voltage emergency assist when the high-voltage system fails, effectively preventing steering loss. Featuring full electrical isolation, IP67 protection and CAN bus control, it guarantees driving safety for passenger and heavy-duty electric vehicles.
Products Description
| High voltage module motor parameters (controller 400-700VDC) | |||
| Motor & Controller Model | EHPS-38CBJJNF01-010 | ||
| Motor Rated Voltage (VAC) | 380 | Temperature Control Resistor Type | None |
| Rated Power (kW) | 5 | Rated Speed (r/min) | 1500 |
| Maximum Output Power (kW) | 10 | Rated Frequency (Hz) | 100 |
| Induced Voltage at Rated Speed (VAC) | 286.1 | Number of Motor Poles | 8 poles (4 pairs of poles) |
| Rated Phase Current (A) | 11 | Line Resistance (Ω) (at 20°C) | 1.45 |
| Peak Phase Current (A) | 23 | Duty Cycle | S2-3min |
| D-Axis Inductance (mH) | 8.035 | Rated Efficiency (%) | ≥92% |
| Q-Axis Inductance (mH) | 22.08 | Insulation Grade | Class H |
| Rated Torque (Nm) | 31.83 | Protection Grade | IP68 |
| Peak Torque (Nm) | 63.7 | Cooling Method | Natural cooling |
| Speed Range (r/min) | 600-1800 | Ambient Operating Temperature | -40~+85℃ |
| Motor Type | SVC sensorless permanent magnet synchronous motor | ||
| Low voltage module motor parameters (24VDC) | |||
| Peak Power (kW) | 2.5 | Rated speed (r/min) | 1200 |
| Inductive Current at Rated Speed (VAC) | 14.25 | Rated frequency (Hz) | 80 |
| Peak Phase Current (A) | 145 | Number of motor poles | 8 poles (4 pairs of poles) |
| D-Axis Inductance (mH) | 0.03877 | Wire resistance (Ω) | 23 |
| Q-Axis Inductance (mH) | 0.09948 | Duty cycle | S2-3min |
| Peak Torque (Nm) | 23.8 | Ambient operating temperature | -40~+85℃ |
| Motor Type | Permanent magnet synchronous | ||
| 24V EPS motor controller technical parameters | ||
| Item | Parameters | Notes |
| Peak Power (kW) | 2.5 | |
| Peak Output Current (A) | 150 | Good ventilation |
| Peak Current Operating Time (s) | 60 | Good ventilation |
| Carrier Frequency (Hz) | Maximum 10K | |
| Control Power Supply Input Voltage Range (V) | 9-36 | |
| Power Supply Input Voltage Range (V) | 16-32 | |
| Rated Voltage (V) | 24 | |
| Output Frequency (Hz) | 0-250 | |
| Cooling Method | Natural cooling | |
| IP Rating | IP68 | |
| Storage Temperature | -40~+85℃ | |
Product Dimensions and Appearance
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Products details
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Key Advantages
- High Safety Redundancy Avoid complete steering assist failure when high-voltage system malfunctions, meeting strict safety standards for commercial passenger vehicles.
- Fully Isolated Dual Circuits HV and LV windings are physically and electrically separated to eliminate cross-failure risks.
- Low Energy Consumption The low-voltage winding only activates during emergencies, bringing no extra power loss under daily driving.
- High Integration & Easy Installation All-in-one motor-pump structure, compatible with chassis layout of traditional EHPS pumps for convenient replacement.
- Vehicle Speed Sensitive Control Adjust oil flow automatically via CAN communication: large flow for light steering at low speed, small flow for stable steering at high speed.
Application Scopes
New energy buses, electric heavy trucks, new energy sanitation trucks, large electric logistics vehicles and other commercial vehicles requiring redundant steering safety.
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FAQs
Q1: What is a dual power source steering motor? How does it differ from a standard single-power steering motor?
A: It is a dual-winding permanent magnet synchronous motor integrated EHPS assembly. It has two electrically isolated windings inside one motor stator: HV winding powered by vehicle high-voltage battery for normal driving, and LV winding powered by 24V battery for emergency backup. Compared with single-power motor, it solves the fatal risk of total steering assist loss when high-voltage system fails, realizing safety redundancy.
Q2: What HV voltage versions are available for matching?
A: Standard versions cover mainstream commercial vehicle voltages: DC336V / 540V / 600V. Custom 400V/800V versions are available for light trucks and new energy heavy trucks.
Q3: How to select the correct motor power specification?
A: - 6–8m bus / 4.5T sanitation truck: 4kW HV version
- 10–12m passenger bus / 18T heavy truck: 5.5–7.5kW HV version
Q4: What is the protection grade? Can it adapt to chassis wet & dusty environment?
A: Standard protection grade is IP67. The motor housing is sealed with integral die-casting, realizing dust-proof and temporary shallow water immersion resistance, fully adapting to vehicle chassis working conditions.
Q5: Does this product meet vehicle safety regulations for commercial passenge?
Yes.
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