前言这是CSA C838《三相变频驱动系统能效测试方法》的第一版。变频驱动器（VFD）能够在无限扭矩范围内将电机的速度从0%改变到其全范围。本标准定义了一种测试方法，该方法提供了性能信息，有助于选择适合电机驱动过程的VFD。据估计，通过使用VFD控制速度和扭矩，30%的工业电机系统可能会得到改善，从而节省大量能源。 CSA承认，本标准的制定部分得益于BC Hydro、效率新斯科舍省、魁北克Hydro、马尼托巴Hydro、加拿大自然资源部（NRCan）、安大略省能源部（OME）、安大略省电力局（OPA）和加拿大电力协会（CEA）的财政支持。范围1。1本标准规定了在额定电压高达750 V的三相输出变频驱动器（VFD）的不同负载和速度下测定效率的试验程序。 本测试程序仅限于一个电机和一个驱动器的组合。本标准适用于鼠笼式感应电机的电压源逆变器（VSI）脉冲宽度调制（PWM）驱动器，以及其他常用于永磁和磁阻电机驱动系统的三相VFD技术。本标准不包括额定电压大于750 V的VFD。除非辅助设备包含在VFD设备的输入和输出端子范围内，或VFD操作的强制性要求，否则不包括辅助设备。 注:CSA C747涵盖了配备单相专用VFD的小型电机。1.2在CSA标准中，“应”用于表示要求，即用户有义务满足的条款，以符合标准；“应该”用于表示建议或建议但不需要的建议；“可”用于表示一个选项或在标准范围内允许的选项。注释随附条款不包括要求或替代要求； 随附条款的注释的目的是将解释性或信息性材料与文本分开。表和图的注释被视为表或图的一部分，可以作为要求编写。附件被指定为规范性（强制性）或信息性（非强制性）来定义其应用。

PrefaceThis is the first edition of CSA C838, Energy efficiency test methods for three-phase variable frequency drive systems. Variable frequency drives (VFDs) have the ability to vary the speed of the motor from 0% to its full range at an infinite range of torque. This Standard defines a testing methodology that provides performance information that can assist with the process of selecting a VFD adequate to the motor driven process. It is estimated that 30% of all industrial motor systems can potentially be improved by the use of VFDs to control speed and torque, resulting in large energy savings. CSA acknowledges that the development of this Standard was made possible, in part, by the financial support of BC Hydro, Efficiency Nova Scotia, Hydro-Quebec, Manitoba Hydro, Natural Resources Canada (NRCan), the Ontario Ministry of Energy (OME), the Ontario Power Authority (OPA), and the Canadian Electricity Association (CEA).Scope1.1 This Standard establishes the testing procedure for determining efficiencies under varying loads and speeds for three-phase output variable frequency drives (VFDs) with rated voltage up to 750 V. This test procedure is limited to a combination of one motor with one drive. This Standard applies to voltage source inverter (VSI) pulse-width modulated (PWM) drives for squirrel-cage induction motors and other three-phase VFD technologies commonly used with permanent magnet and reluctance motor-drive systems. This Standard does not cover VFDs with a rated voltage rating greater than 750 V. Ancillary equipment are not to be included unless they are contained within the confines of the input and output terminals of the VFD device, or a mandatory requirement for the operation of the VFD. Note: Small motors supplied with special purpose VFDs of the single- phase type are covered by CSA C747. 1.2 In CSA standards, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non- mandatory) to define their application.