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MD-7500-HD Overview

MD-7500-HD – Mustang’s premium fleet maintenance chassis dynamometer for electric and IC engine buses

Today’s Fleet Managers are faced with many challenges – most important of which is maintaining a healthy bottom line. With fuel costs at an all-time high, these challenges have become increasing difficult. Fleets being transitioned from fossil fuels to electric propulsion also face challenges with durability and range to make sure routes can be completed on time each and every day. To help combat these problems and others facing fleet managers today, Mustang Dynamometer offers the MD-7500-HD Series Chassis Dynamometer – which features the most advanced diagnostic capabilities in the industry. The MD-7500-HD is designed to simulate the driving conditions that fleet vehicles encounter on the road every day in a safe and controlled shop floor environment so that critical engine and drivetrain systems can be evaluated to insure vehicles are performing properly and at maximum efficiency. What’s more, the MD-7500-HD offers several levels of testing capabilities in a modular, compact package and with capabilities that can be upgraded in the future as your needs change. Every vehicle in your fleet can now be tested and validated before and after a repair to ensure proper diagnosis and repairs have been performed. In addition to testing repaired vehicles, the MD-7500-HD can be used to test vehicles on a regular basis as a preventative maintenance measure which decreases unexpected breakdowns and allows fleet management to control fuel costs while reducing repair costs. Periodic testing keeps fuel consumption to a minimum and helps technicians identify suspect components before they fail. A proactive approach to Fleet Service can prevent unexpected engine and or drive-train failure which saves organizations thousands of dollars in lost fair revenues. At the heart of the MD-7500-HD is a set of three air-cooled eddy current power absorbers. Each absorber, or brake, can hold up to 600-hp (total power of 1,800-hp) – more than enough to simulate a fully loaded transit bus. As the systems PAU’s (brakes) are air-cooled, no water is required to or from the device – eliminating the high cost of water consumption and/or the cost of an expensive water recovery system – which can sometimes exceed the cost of the dynamometer system itself. Mustang is the only company that offers a Universal Fleet Test Bed without water supply requirements. AC Motors can be added to simulate regeneration and validate range for organizations that have transitioned to carbon free electric propulsion. The 7500 is the best solution for fleet managers looking to improve their bottom line and offer disruption-free public transportation.

MD-7500-HD Specifications

Max Horsepower: 3,000 hp (1,341 kW) peak measurement capacity

Max Absorption: 1,800 hp (1,341 kW) peak absorption

Loading Device: Three (3) air-cooled eddy current power absorbers

Motor: Available as an option for transient testing

Inertia: 12,000 lbs. (5,433 kg) base mechanical inertia, nominal

Max Speed: 100 mph (161 km/hr)

Controls: Closed Loop Digital Controller with web based Holeshot Software. Includes Patented Virtual Road Simulation Technology.

Rolls/Wheelbase:

Precision machined & dynamically balanced​
Knurled surface finish​
19.75” (502 mm) diameter balanced rolls​
41” (1,067 mm) face length​
25.88” (657 mm) inner track width​
107.88” (2,740 mm) outer track width​
19.6” (498 mm) roll spacing
Rollers are belted for bi-directional testing capability

Roll Lock: Between roll lift with integrated roll lock

Roll Decelerator: Allows vehicle deceleration without use of vehicle brakes. Eddy Current PAU used to decelerate rollers.

Air Requirements: 120 PSI (8 bar), dry, regulated, oil free

Power Requirements:

115 VAC, single phase, 60 Hz, 20 Amps (instrumentation)
230 VAC, three phase, 60 Hz, 80 Amps (dynamometer)

Axle Weight: 24,000 lbs. (10,886 kg) maximum

Shipping Weight: 18,000 lbs. (6,804 kg) dynamometer weight only

Upgradeable to AWD: No