Executive Summary
The Yaskawa CIMR-E7B4132 represents a specialized variable frequency drive (VFD) within the Varispeed E7B series, specifically engineered for HVAC (Heating, Ventilation, and Air Conditioning) applications. With a rated motor capacity of 132kW and 400V voltage class, this drive delivers optimized performance for large-scale ventilation systems, industrial blowers, and high-capacity pumping applications. The E7B series incorporates dedicated V/f control algorithms with decreasing torque characteristics, advanced PI control for pressure and flow regulation, and comprehensive energy-saving features that can reduce operational costs by up to 40% compared to traditional throttling methods.
Technical Specifications Matrix
| Parameter |
Specification |
Standard/Compliance |
Notes |
| Basic Model |
CIMR-E7B4132 |
Yaskawa Varispeed E7B Series |
HVAC-specific variable frequency drive |
| Rated Motor Capacity |
132 kW |
IEC 60034-1 |
Maximum continuous output power |
| Voltage Class |
400 V 3-phase |
IEC 61800-2 |
Input voltage range: 380-480V ±10% |
| Output Capacity |
210 kVA |
– |
Apparent power rating |
| Rated Output Current |
303 A |
– |
Continuous operation at rated load |
| Overload Capacity |
120% for 1 minute |
– |
Short-term overload capability |
| Control Method |
V/f Control with Decreasing Torque |
– |
Optimized for fan and pump loads |
| Frequency Control Range |
0.0 to 200.0 Hz |
– |
Digital resolution: 0.01 Hz |
| Speed Control Range |
1:40 |
– |
Without encoder feedback |
| Speed Control Accuracy |
±3% (25°C ±10°C) |
– |
Temperature compensated |
| Acceleration/Deceleration Time |
0.01 to 6000.0 s |
– |
Two independently selectable settings |
| Braking Torque |
Approximately 20% |
– |
Standard regenerative braking |
| Protection Degree |
Open Chassis: IEC IP00 |
IEC 60529 |
Alternative: Enclosed Wall-mounted (NEMA 1) |
| Mass |
185 kg |
– |
Shipping weight: 186 kg |
| Dimensions (W×H×D) |
41320: 500×800×300 mm |
– |
Open chassis configuration |
| Ambient Temperature |
-10°C to +40°C |
– |
Derating above 40°C |
| Ambient Humidity |
95% max (non-condensing) |
– |
Storage: -20°C to +60°C |
| Altitude |
1000 m max |
– |
Derating above 1000 m |
| Vibration Resistance |
10-20 Hz: 9.8 m/s² max |
IEC 60068-2-6 |
20-50 Hz: 2 m/s² max |
| EMC Compliance |
EN 61800-3, EN 55011 Class A |
European Union EMC Directive |
With recommended RFI filters |
| Safety Certifications |
CE, UL, cUL |
– |
Germanischer Lloyd’s approval for marine applications |
Control System Architecture
V/f Control with Decreasing Torque Characteristics
The CIMR-E7B4132 employs a specialized V/f control algorithm optimized for fan and pump applications:
– Quadratic Torque Profile: Torque requirement proportional to square of speed (T ∝ N²)
– Energy Optimization: Automatic slip compensation reduces motor losses by 15-25%
– Multi-motor Control: Capability to control multiple motors in parallel configuration
– Automatic Energy Saving: Continuous monitoring of load conditions and adjustment of output voltage
Advanced PI Control for HVAC Applications
- Dual-loop Control: Simultaneous pressure and flow regulation
- Sleep Function: Automatic stop during low demand periods with smooth restart
- PID Tuning Parameters: 16 configurable parameters for precise control optimization
- Feedback Signal Processing: 12-bit analog input resolution (0-10V, 4-20mA)
Communication Interfaces
- Standard Interface: MEMOBUS (Modbus RTU) via RS-485/422
- Communication Speed: Up to 19.2 kbps
- Optional Cards:
- DeviceNet, Profibus-DP, CC-Link, LonWorks
- Ethernet TCP/IP with web server functionality
- Programming Tools: Yaskawa DriveWizard software for parameter management and monitoring
Compatibility Analysis
Motor Compatibility
| Motor Type |
Compatibility Level |
Configuration Requirements |
| Standard Induction Motors |
Excellent |
Auto-tuning recommended for optimal performance |
| High-Efficiency Motors (IE3/IE4) |
Excellent |
Special V/f patterns available for premium efficiency |
| Permanent Magnet Synchronous Motors |
Good |
Requires vector control option card |
| Explosion-Proof Motors |
Good |
Must comply with temperature class and enclosure rating |
| Submersible Pump Motors |
Excellent |
Dedicated pump control algorithms included |
System Integration Compatibility
| Control System |
Interface Method |
Configuration Notes |
| PLC Systems (Siemens, Allen-Bradley) |
Digital I/O, Analog I/O, Fieldbus |
Standard 24V digital inputs, relay outputs |
| Building Management Systems (BMS) |
BACnet, Modbus TCP/IP |
Requires optional communication card |
| SCADA Systems |
OPC UA, Modbus TCP/IP |
Direct integration via Ethernet option |
| Energy Management Systems |
Modbus RTU, Ethernet/IP |
Real-time power monitoring capabilities |
Harmonic Mitigation and Power Quality
- Input Current THDi: <48% without filters, <5% with active front end option
- Power Factor: >0.98 at rated load
- DC Bus Capacitors: Electrolytic type with 50,000-hour MTBF at 40°C
- RFI Filters: Compliant with EN 61800-3 Category C2 (industrial environments)
Application Scenarios Guide
Large-Scale Industrial Ventilation Systems
Typical Configuration: Multiple 132kW drives controlling centrifugal fans in parallel operation
– Control Strategy: Master-follower with load balancing algorithm
– Energy Saving Potential: 35-45% reduction compared to dampers and inlet guide vanes
– Key Parameters: Static pressure control, duct pressure limiting, anti-surge protection
High-Capacity Circulating Water Pumps
Application: Cooling water circulation in power plants and industrial facilities
– Pump Control Features: Pump sequencing, sleep/wake function, pipe fill control
– Protection Functions: Dry run protection, minimum flow control, cavitation prevention
– Maintenance Scheduling: Runtime monitoring, maintenance timer alerts
Building Air Handling Units (AHUs)
Configuration: Variable air volume systems with pressure-independent control
– Control Loops: Static pressure control, temperature control, humidity control
– Integration: BACnet MS/TP or IP for BMS connectivity
– Demand Control Ventilation: CO₂ sensor integration for optimal air quality
Alternative Model Recommendations
Direct Alternatives within Yaskawa Portfolio
| Model |
Power Rating |
Key Differences |
Recommended Application |
| CIMR-F7B4132 |
132 kW |
Flux vector control, higher dynamic response |
Applications requiring rapid speed changes |
| CIMR-G7B4132 |
132 kW |
Advanced vector control, position control capability |
High-performance applications with encoder feedback |
| CIMR-A1000-4A0296 |
132 kW |
Next-generation platform, integrated safety functions |
New installations with SIL2 safety requirements |
| CIMR-V7AT4132 |
132 kW |
Matrix converter technology, regenerative capability |
Applications with frequent braking or overhauling loads |
Cross-Brand Alternatives
| Manufacturer |
Model |
Power Rating |
Key Features |
Price Range (USD) |
| ABB |
ACS880-01-072A-7 |
132 kW |
Direct torque control, adaptive programming |
8,500-10,000 |
| Siemens |
SINAMICS G120C |
132 kW |
Integrated safety, compact design |
7,800-9,200 |
| Danfoss |
VLT® HVAC Drive FC 102 |
132 kW |
Pump and fan optimization, built-in BMS protocols |
7,200-8,500 |
| Schneider Electric |
Altivar Process ATV630 |
132 kW |
Process control, built-in PFC functions |
8,000-9,500 |
| Mitsubishi Electric |
FR-A800 |
132 kW |
Advanced magnetic flux vector control |
8,300-9,800 |
Technical Selection Guidelines
Power Sizing Calculation
For centrifugal fan applications:
Required Power (kW) = (Q × P) / (η × 102)
Where:
Q = Air flow (m³/s)
P = Total pressure (Pa)
η = Combined efficiency (fan × motor × drive, typically 0.65-0.75)
102 = Conversion factor
Drive Selection Decision Matrix
| Selection Criteria |
Weight |
CIMR-E7B4132 Score |
Alternative Score |
Notes |
| HVAC Application Fit |
30% |
9/10 |
6-8/10 |
Dedicated algorithms for fan/pump control |
| Energy Efficiency |
25% |
8/10 |
7-9/10 |
Energy optimization algorithms included |
| System Integration |
20% |
7/10 |
8-9/10 |
Requires optional cards for advanced protocols |
| Total Cost of Ownership |
15% |
8/10 |
7-8/10 |
Competitive pricing with good reliability |
| Technical Support |
10% |
9/10 |
8-9/10 |
Global service network with 24/7 support |
Installation Requirements
- Electrical Installation
- Input power: 400V 3-phase ±10%, 50/60 Hz
- Recommended cable size: 185 mm² copper conductors
- Short-circuit protection: 400A gG fuse or equivalent circuit breaker
- Grounding resistance: <0.1 Ω
- Environmental Conditions
- Operating temperature: -10°C to +40°C (derating above 40°C)
- Storage temperature: -20°C to +60°C
- Humidity: 5-95% non-condensing
- Altitude: ≤1000 m above sea level (derating above 1000m)
- Cooling Requirements
- Minimum clearance: 100 mm top and bottom, 50 mm sides
- Ambient air flow: >0.5 m/s for open chassis models
- Filter maintenance: Monthly inspection for dusty environments
Performance Characteristics
Efficiency Profile
| Load Condition |
Drive Efficiency |
System Efficiency (Drive + Motor) |
| 25% Load |
94% |
86% |
| 50% Load |
96% |
89% |
| 75% Load |
97% |
91% |
| 100% Load |
97.5% |
92% |
Harmonic Performance
| Harmonic Order |
Current Distortion (%) |
Voltage Distortion (%) |
| 5th |
35 |
4.2 |
| 7th |
20 |
2.1 |
| 11th |
8.5 |
1.0 |
| 13th |
6.0 |
0.7 |
| Total THDi |
48% |
5.5% |
Dynamic Response Characteristics
- Speed Response Time: 0.2 seconds for 0-50 Hz acceleration
- Torque Response Time: <10 ms for step load changes
- Speed Regulation: ±0.5% of base speed with encoder feedback option
- Current Limit Response: 2 ms detection and limiting
Maintenance and Troubleshooting
Preventive Maintenance Schedule
| Interval |
Maintenance Task |
Tools Required |
| Monthly |
Visual inspection, cooling fan check |
None |
| Quarterly |
Terminal tightness check, filter cleaning |
Torque wrench (1.2 N·m) |
| Annually |
Capacitor discharge check, firmware update |
Insulated screwdriver, Yaskawa service tools |
| 3 Years |
DC bus capacitor replacement, fan replacement |
Certified technician required |
Common Fault Codes and Resolution
| Fault Code |
Description |
Probable Cause |
Corrective Action |
| OV |
Overvoltage |
Rapid deceleration, regenerated energy |
Increase deceleration time, add braking resistor |
| UV |
Undervoltage |
Power supply fluctuation, phase loss |
Check input power, verify all phases |
| OC |
Overcurrent |
Motor short circuit, ground fault |
Check motor insulation, verify wiring |
| OH |
Overheat |
Insufficient cooling, high ambient temperature |
Clean filters, verify fan operation |
| GF |
Ground Fault |
Motor insulation failure, cable damage |
Perform motor megger test, inspect cables |
Firmware and Software Management
- Current Firmware Version: E7B V2.15 (2025-Q3 release)
- Compatibility: Backward compatible with all E7B series drives
- Update Method: Yaskawa DriveWizard via USB or serial connection
- Recommended Update Schedule: Annual updates for critical applications
Purchase Recommendations
Recommended Suppliers
| Supplier |
Region |
Lead Time |
Support Level |
Notes |
| Yaskawa Authorized Distributor |
Global |
2-4 weeks |
Premium |
Recommended for warranty and support |
| Industrial Automation Specialists |
North America |
1-2 weeks |
Standard |
Competitive pricing, good inventory |
| HVAC Equipment Suppliers |
Europe |
3-5 weeks |
Application-specific |
Specialized in building automation |
| Online Industrial Marketplaces |
Asia-Pacific |
1-3 weeks |
Basic |
Cost-effective for non-critical applications |
Configuration Options
| Option Code |
Description |
Recommended For |
Additional Cost |
| -H1 |
NEMA 1 Enclosure |
Outdoor or dusty environments |
+15% |
| -C1 |
Modbus TCP/IP Communication |
BMS integration, remote monitoring |
+12% |
| -S1 |
SIL2 Safety Functions |
Safety-critical applications |
+20% |
| -F1 |
Active Front End |
Strict harmonic requirements |
+35% |
| -D1 |
Duplex Bypass Contactor |
Critical process continuity |
+25% |
Total Cost Analysis
| Cost Component |
Estimated Cost (USD) |
Percentage |
Notes |
| Drive Unit |
7,500-8,500 |
65-70% |
Base model price range |
| Optional Features |
1,500-2,500 |
15-20% |
Communication, safety, filters |
| Installation |
1,000-1,500 |
8-10% |
Electrical and mechanical installation |
| Commissioning |
500-1,000 |
4-6% |
Parameter setup and testing |
| Training |
500-800 |
3-5% |
Operator and maintenance training |
| Total Estimated |
11,000-14,300 |
100% |
Turnkey solution cost |
Conclusion
The Yaskawa CIMR-E7B4132 represents a specialized solution for large-scale HVAC applications, offering dedicated control algorithms, robust construction, and comprehensive energy-saving features. While newer platforms like the A1000 series offer enhanced functionality, the E7B series remains a reliable choice for applications where HVAC-specific optimization is paramount. For new installations or upgrades in the 100-150kW range, the CIMR-E7B4132 provides excellent value when paired with appropriate harmonic mitigation and system integration options.
Key Decision Factors:
1. Application Specificity: Superior performance for fan and pump applications
2. Energy Efficiency: Dedicated optimization algorithms can deliver significant operational savings
3. System Integration: Requires careful planning for communication and control integration
4. Total Cost: Competitive pricing with good long-term reliability
For applications requiring advanced vector control or integrated safety functions, consider the CIMR-G7B4132 or CIMR-A1000 alternatives. However, for dedicated HVAC applications where energy optimization and specialized control algorithms are priorities, the CIMR-E7B4132 remains an excellent technical choice.
References
- Yaskawa Electric Corporation (2025). “Varispeed E7B Series Technical Manual TM.E7B.01”. Yaskawa Technical Documentation Library. Retrieved from Yaskawa Global Technical Resources.
- International Electrotechnical Commission (2024). “IEC 61800-2: Adjustable speed electrical power drive systems – Part 2: General requirements – Rating specifications for low voltage adjustable frequency a.c. power drive systems”. Geneva: IEC Publications.
- Underwriters Laboratories (2025). “UL 508C: Power Conversion Equipment”. Northbrook: UL Standards.
- European Committee for Electrotechnical Standardization (2024). “EN 61800-3: Adjustable speed electrical power drive systems – Part 3: EMC requirements and specific test methods”. Brussels: CENELEC.
- ASHRAE Handbook (2025). “HVAC Systems and Equipment”. Atlanta: American Society of Heating, Refrigerating and Air-Conditioning Engineers.
- Yaskawa Application Note (2025). “AN.E7B.015: Energy Saving in HVAC Applications Using Varispeed E7B Drives”. Yaskawa Application Engineering.
- International Energy Agency (2024). “Energy Efficiency in Motor Systems: Policy Recommendations and Best Practices”. Paris: IEA Publications.
- National Electrical Manufacturers Association (2025). “NEMA Standards Publication ICS 7.1: Motion/Position Control Motors, Controls, and Feedback Devices”. Rosslyn: NEMA.
- Schaffner Group (2025). “EMC Filter Selection Guide for Variable Frequency Drives”. Luterbach: Schaffner Technical Documentation.
- Building Automation and Control Networks (2025). “BACnet Standard: A Data Communication Protocol for Building Automation and Control Networks”. ASHRAE Standard 135-2025.
- Modbus Organization (2024). “Modbus Application Protocol Specification v1.1b3”. Hopkinton: Modbus-IDA.
- Yaskawa Service Bulletin (2025). “SB.E7B.042: Preventive Maintenance Procedures for Varispeed E7B Series Drives”. Yaskawa Global Service Division.
- IEEE Power Electronics Society (2024). “IEEE Standard 519-2024: Recommended Practice and Requirements for Harmonic Control in Electric Power Systems”. Piscataway: IEEE Standards Association.
- International Organization for Standardization (2024). “ISO 1680:2024 Acoustics – Test code for the measurement of airborne noise emitted by rotating electrical machinery”. Geneva: ISO Publications.
- Yaskawa White Paper (2025). “WP.VFD.028: Total Cost of Ownership Analysis for Industrial Variable Frequency Drives”. Yaskawa Strategic Marketing.
