---
title: "One Module, Not Two: Why Integrated Motor-Inverter Design Is Changing Vehicle Control Architecture"
description: Combining the motor and inverter into one module cuts weight, wiring and failure points in EV powertrains. Here's what it means for your control architecture, and how EMB Power integrates it.
---

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 Oct 5, 2026, 10:12:35 AM

# One Module, Not Two: Why Integrated Motor-Inverter Design Is Changing Vehicle Control Architecture

[EMB Power Team](https://blog.emb-power.com/author/emb-power-team)

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Combining the motor and inverter into a single housing removes a wiring harness, a set of connectors and a separate enclosure from the powertrain — and with them, weight, cost and failure points. For engineering teams designing electric and hybrid vehicle control systems, that consolidation changes more than packaging: it changes how the control architecture around the powertrain has to be designed. Here's what's driving the shift, what it demands of your control strategy, and how EMB Power's engineering team integrates these modules for UK and EU customers.

Key Takeaways

- One housing for motor + inverter cuts weight, wiring and failure points — but concentrates heat, EMI and mechanical load in one place.
- Control strategy synchronisation becomes the hard part: the ECU has to coordinate both halves of the system in real time.
- EMB Power sources and integrates modules like the Cascadia Motion IM-225 via New Eagle, alongside Raptor-based control engineering, for UK and EU customers.

## What Is an Integrated Motor-Inverter Module?

An integrated motor-inverter module houses the electric motor and the inverter — the power electronics that convert DC battery power into the AC that drives the motor — in a single unit, rather than as two separate components joined by cabling. Traditionally, motor and inverter were kept apart, each with its own enclosure, cooling circuit and connectors, linked by a wiring harness that added weight, assembly steps and potential points of failure.

Uniting the two into one module allows for a more compact layout, shared thermal management, and reduced electromagnetic interference (EMI) from shorter, better-shielded power paths. That combination of benefits is why integrated designs are now common across electric and hybrid vehicles, off-highway machines, and increasingly autonomous platforms.

## Why Engineering Teams Are Moving to Integrated Designs

The case for integration goes beyond saving space. The main benefits engineering teams report are:

| **Reduced weight** | Fewer connectors and support structures — matters most where every kilogram affects range. |
| --- | --- |
| **Enhanced efficiency** | Fewer interconnections mean fewer energy losses and better thermal management. |
| **Simplified cooling** | A single circuit can serve both motor and inverter, cutting cooling-system cost and complexity. |
| **Lower BOM cost** | Fewer discrete parts means a simpler manufacturing and assembly process. |
| **Better dynamic performance** | Tighter motor/inverter coordination supports higher power density and faster response. |

## Design and Integration Considerations

None of those benefits arrive for free. Pulling the motor and inverter into one housing concentrates engineering risk in the same places it concentrates the hardware.

### Thermal management

Co-locating the motor and inverter concentrates heat generation in one place. Dual oil/water cooling circuits are now standard on integrated modules to keep both sides of the unit within operating limits under sustained load.

### Electromagnetic interference

Running power electronics close to the motor means EMI shielding and PCB/cable layout need careful attention — interference here can affect sensitive control and sensor signals elsewhere in the vehicle.

### Mechanical integration

Vibration, alignment and structural integrity all need to be engineered for the combined mass and mounting pattern of the integrated unit, not treated as two separate mechanical problems.

### Control strategy synchronisation

This is where the ECU earns its place. An integrated module demands tighter coordination between motor and inverter control loops than a split system does — which is where a capable control platform, such as the Raptor ECUs we work with, becomes central to the design rather than an afterthought.

### Safety and compliance

As with any safety-relevant vehicle system, integrated modules still need to be designed, tested and documented against ISO 26262 functional safety requirements through the full development lifecycle.

> "The mechanical integration is the easy part. The real engineering challenge is getting the motor and inverter control loops to act as one system, not two."

## Where Raptor ECUs Fit In

Precise synchronisation between motor and inverter control loops is what makes an integrated module perform as intended rather than just occupy less space. Raptor ECUs, built on the Raptor® eMBD™ model-based development platform, give engineering teams real-time control precision, fault-tolerant diagnostics, and the scalability to move from a prototype electric vehicle to an off-highway production application without re-architecting the control system each time.

As New Eagle's exclusive UK and EU partner, EMB Power supplies Raptor hardware and the OpenECU toolchain to engineering teams across the automotive, marine, commercial vehicle and off-highway sectors, and provides the integration engineering that sits around it — control strategy design, calibration, and the embedded software work needed to get an integrated powertrain module running reliably in a real vehicle.

## Case in Point: The IM-225 Integrated Motor-Inverter Module

![Cascadia Motion IM-225 integrated motor-inverter module](https://store.neweagle.net/wp-content/uploads/2021/09/CAS-IM225-DX-D.png)

The Cascadia Motion IM-225 integrated motor-inverter module. Image: New Eagle product catalogue.

One example of this category of hardware available through EMB Power's supply chain is the IM-225, an integrated motor-inverter module manufactured by Cascadia Motion (a BorgWarner company) and supplied via New Eagle's component range. Based on the manufacturer's published specification as of 2026:

| Specification | Detail |
| --- | --- |
| Manufacturer | Cascadia Motion (BorgWarner) |
| Maximum voltage | 840 Vdc (with the CM200DZ inverter) |
| Peak torque | 500 Nm |
| Cooling | Integrated oil cooler and water pump |
| Transmission mounting | 6-bolt Cascadia, 16-bolt Remy or 4-bolt Porsche G50 patterns |
| Weight | 142 lbs (approx. 64 kg) |

Specifications per the [manufacturer's published product listing](https://store.neweagle.net/?p=18102); confirm current ratings before specifying for a project, as inverter pairing affects maximum voltage.

The multiple bolt-pattern options matter in practice: they let engineering teams pair the module with an existing transmission rather than redesigning the driveline around the motor. EMB Power can advise on sourcing and integrating modules like this as part of a wider controls architecture, alongside the Raptor ECU and OpenECU platforms we supply in the UK and EU.

## Implementation Best Practices

1. **Run thermal analysis early.** Simulate heat distribution across the combined module before committing to a cooling circuit design, not after.
2. **Test for EMI as a system, not a component.** Shielding and layout decisions need to account for the inverter's proximity to the motor and to other vehicle electronics.
3. **Treat the mechanical design holistically.** Mounting, vibration damping and alignment need to account for the combined unit's mass and operating envelope.
4. **Synchronise control loops deliberately.** A capable ECU platform with precise sensor sampling is what turns a mechanically integrated module into a well-controlled one.
5. **Build safety compliance in from the start.** ISO 26262-aligned processes are far cheaper to design in than to retrofit once the module is specified.

## Where This Is Heading

Expect integrated motor-inverter designs to keep pushing toward higher power density, smarter onboard diagnostics, and tighter coupling with vehicle-level control strategy as electrification extends from passenger EVs into commercial, marine and off-highway applications. The common thread across all of them is that the control architecture has to be designed around the integrated hardware from the outset, not bolted on afterwards.

## Talk to EMB Power About Your Control Architecture

If you're specifying an integrated motor-inverter module for an EV, hybrid or off-highway project, EMB Power's engineering team can help with sourcing, Raptor-based control integration, and the embedded software work needed to get it running reliably.

[Get in touch with EMB Power →](https://www.emb-power.com/contact-us)

[ECUs](https://blog.emb-power.com/tag/ecus)

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