Sierra CP Engineering Limited

AC Dynamometers

AC Dynamometers

Technologically Sound and Cost Effective

• High performance-to-cost ratio
• Robust, fatigue-rated design
• Calibration arms and weight pans are included
• Custom design to meet specific customer requirements
• Worldwide parts and service availability

Overview

Sierra supplies transient AC dynamometers with associated regenerative inverter drives up to 1,000 kW and 8,000 Nm and 16,000rpm for numerous small and large engine and vehicle test applications. When we review your request for a small engine dyno, our approach is most often based on a modular design to ensure that we meet technical specifications with the most cost-effective methods.

Sierra's solutions encompass both higher-speed gasoline engine requirements, as well as the typically higher-torque demands from modern diesel engines.

Engine Applications

• Emissions certification work
• Transient test cycles
• Drive cycles
• Vehicle simulation work
• Endurance and reliability

Note: Dynanometers or “Dynos” are also frequently referred to as Dynometers or Dynomometers. All of these references refer to the same product.

Product Benefits

• Each small engine dyno tester is matched to a 3-phase four quadrant AC regenerative inverter drive. The inverter drive incorporates filters for high-order and low-order harmonics to prevent cross-talk with adjacent equipment. The drives are physically compact without sacrificing outright performance.
• Our standard range of motor dynos has been carefully selected for the majority of needs of the engine testing industry, but we consider any requirements for special applications. This includes performance and operational requirements such as water-cooled motors, user-specific center line heights, and provision for shaft guarding. When operating with Sierra’s CADET V14 control automation and data logging system, all machines are suitable to generate the dynamic test requirements for US-EPA, UK Federal and European emissions tests, among many others. All machines are suitable to generate the dynamic test requirements for Federal and European emissions tests.

Product Benefits

• High performance-to-cost ratio
• Robust, fatigue-rated design
• Low inertia
• Foot-mounted forced air-cooled, prefabricated frame
• Torque measurement from in-line torque flange
• High accuracy and speed measurement from optical encoder
• Calibration arms and weight pans are included
• Custom design to meet specific customer requirements
• High level of standardization
• Worldwide parts and service availability

Options

• Drive cabinets for motoring or absorbing AC dynamometers (new or existing dynamometers)
• Dynamometer control systems; see CADET V14 and CADET Edge
• Shaft guards
• Dynamometer mounting frames
• Load cells
• In-line torque meters
• Encoders and toothed wheels
• Climatic and NVH solutions
• Chassis dynamometer systems
• Polo magnetic water filters

Sierra provides suitable AC variable frequency, four-quadrant regenerative drives sized to the AC dynamometer requirements, including any overload requirements.

Specifications

High Speed Dynamometers

Speeds of <16,000+ RPM are achievable with specialist bearings and cooling