Allient EHS Electrohydraulic Pump Motors Review: Specs, Price and Applications
Allient EHS combines a brushless motor and integrated drive electronics for direct operation of electrohydraulic pumps. The supplied Allied Motion listing describes two frame sizes and seven models for vehicle steering and auxiliary lifting duties. It identifies a pump-drive motor platform, rather than a complete hydraulic power unit.
Quick Verdict
A candidate for an electrically driven hydraulic system where the selected pump and motor can meet the real pressure-flow cycle. Hydraulic matching and vehicle supply behavior matter as much as the convenience of integrated electronics.
Allient EHS Electrohydraulic Pump Motors at a Glance
Specification | Details |
Family | EHS |
Brand | Allient / Allied Motion |
Construction | Brushless motor with integrated drive electronics |
Listed range | Two frame sizes, seven models |
Intended load | Direct electrohydraulic pump drive |
Applications listed | Vehicle steering and forklift lifting/auxiliary functions |
Design and Engineering Assessment
Required shaft power follows hydraulic pressure multiplied by flow, with allowances for pump and motor efficiency. A steering duty with brief demand peaks is different from sustained lifting; size the complete pressure-flow cycle and cooling arrangement.
A motor and drive combination does not determine fluid compatibility, reservoir design, relief behavior or hydraulic fault response. Those functions belong to the selected pump and hydraulic circuit, while the electrical supply must tolerate the required current and transients.
Decentralizing the Axis
An integrated motor and drive moves power electronics onto the driven axis. This can reduce the need for a separate cabinet amplifier and simplify part of the wiring, while creating local requirements for heat dissipation, supply distribution and service access. The machine layout should be evaluated as a whole rather than assuming that moving electronics automatically reduces every installation cost.
The selected motor, winding and local drive must support the required continuous and intermittent duty. An integrated package still dissipates heat in the motor and electronics, and its installation can affect the available thermal path. Evaluate the actual motion cycle and ambient conditions before applying a peak-torque or peak-power figure to continuous operation.
Network, Feedback and Power
Select the communication variant to match the controller and its intended drive profile. Point-to-point command modes and cyclic synchronous modes divide responsibilities differently between controller and drive. Enable sequencing, communication timeout and fault recovery must be defined for the selected architecture rather than inferred from the fieldbus name alone.
Absolute feedback can simplify referencing, but digital resolution and actual position accuracy remain different quantities. The machine’s useful result also depends on mounting, coupling and the driven mechanism. Supply wiring, grounding and connector selection must support the electrical duty even when the product combines several functions in a single housing.
Commissioning and Maintainability
Check direction, feedback interpretation, network configuration and the intended stop behavior before running full motion. Tune and evaluate the complete loaded mechanism, including repeated moves and warm operation. If the selected unit offers a safety function, incorporate the exact function and wiring into the machine’s defined safety architecture.
A compact integrated package makes the full ordering code particularly important. The replacement must restore motor, drive, encoder and network options together. Preserve the parameter set, mechanical datum and commissioning procedure so that a later exchange returns the axis to the qualified operating condition.
Applications and Selection
Electrohydraulic steering and auxiliary pump drives on industrial vehicles and mobile equipment.
For Allient EHS Electrohydraulic Pump Motors, define the actual machine duty before selecting an ordering configuration. Include the required operating point, available installation space, environment and control interfaces. The specification table describes the product or family; the surrounding machine determines which of those features matters for the intended job.
Price and Value
Price: Request a quote for the exact configuration. Compare the product, compatible control equipment, required mechanical parts, cabling and commissioning as one installed system. A component price alone does not represent the cost of a working automation axis.
Evaluate an alternative against the same duty and acceptance criteria. Match the continuous operating requirement first, then compare transient capability, feedback, mechanical fit and support. This avoids choosing between superficially similar products whose ratings describe different operating conditions.
Pros and Cons
Advantages
Motor and electronics integrated for pump-drive duties
Several frame/model selections for mobile hydraulic systems
Limitations
Requires a separately engineered hydraulic circuit
Published family description does not supply a universal pressure or flow rating
Who Should Consider Allient EHS Electrohydraulic Pump Motors?
Consider Allient EHS Electrohydraulic Pump Motors for electrohydraulic steering and auxiliary pump drives on industrial vehicles and mobile equipment. Establish the required operating point and installation interfaces before choosing the configuration, and use a representative loaded cycle as the acceptance basis.
Allient EHS Electrohydraulic Pump Motors FAQ
What is Allient EHS Electrohydraulic Pump Motors?
Allient EHS combines a brushless motor and integrated drive electronics for direct operation of electrohydraulic pumps.
Which specifications matter most?
Family: EHS. Brand: Allient / Allied Motion. Interpret the remaining ratings within the selected configuration and operating duty.
What applications should it be considered for?
Electrohydraulic steering and auxiliary pump drives on industrial vehicles and mobile equipment.
What is the main advantage?
Motor and electronics integrated for pump-drive duties. Several frame/model selections for mobile hydraulic systems.
What limitation affects integration?
Requires a separately engineered hydraulic circuit. Published family description does not supply a universal pressure or flow rating.
What is the price?
Request a quote for the selected model, options and delivery terms. Any stated example price applies only to its identified seller configuration and may change.
How should an alternative be compared?
Use the same operating duty, installation envelope and acceptance requirements. Compare the complete system, including the compatible drive or controller, mechanical interfaces and commissioning effort.
What should be specified when ordering?
State the complete model or configuration, intended operating point, mechanical interfaces and required control equipment. Include the relevant environment, accessories and quantity so that the quotation describes a usable system.
Prices are indicative and may change. Confirm the final configuration, commercial terms and delivery schedule before ordering.
